1999 GMC Flowmaster Parts


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Flowmaster
  • 3.0 in. Offset Inlet/Offset Outlet; Case Dimensions 5 in. x 10 in. x 13.5 in.; 17.5 in. Overall Length; 409 Stainless Steel Not Direct Fit-Some Adaptation Required
  • Super 40™ Delta Flow Muffler; 3.0 in. Offset Inlet/Offset Outlet; Case Dimensions 5 in. x 10 in. x 13.5 in.; 17.5 in. Overall Length; 409 Stainless Steel;
  • Super 40™ Delta Flow Muffler
  • Product Attributes:
    • Tip Quantity: 0
    • Automotive Item Grade: High Performance
    • Mount Type: Uses New Hangers (not Included)
    • Muffler Type: Reflection
    • California Proposition 65 Chemical Name 2: Chromium (hexavalent Compounds)
    • Outlet Connection Type: Pipe
    • California Proposition 65 Chemical Name 1: Nickel (metallic)
    • Outlet Position: Offset
    • Sound Level: Aggressive
    • WARNING CA Proposition 65: Yes
    • Fitment: Universal
    • Body Width: 10.000 In.
    • WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov
    • Muffler Series: Super 40 Series
    • Overall Length: 19.500 In.
    • Shape: Oval
    • Inlet Type: Single Offset
    • Inlet Position: Offset
    • Body Length: 13.500 In.
    • Inlet Connection Type: Pipe
    • Outlet Type: Single Offset Outlet
  • Features:
    • Durable Fully Welded 16ga Stainless Steel
    • Limited Lifetime Warranty
    • Deep Aggressive to Moderate Exhaust Note
    • Moderate Interior Resonance
    • Excellent Performance On High Horsepower Vehicles
    • Race Proven Patented Delta Flow® Technology
    • No Internal Packing To Blowout
    • Premium Flowmaster Quality
  • Developed from our Top Ten race muffler lineup for use on the street/strip, the Super 40 features Flowmasters Delta Flow technology. Its larger case profile provides the best of both worlds of performance and sound, especially on forced induction and high horsepower vehicles. The Super 40 has that deep powerful sound of the Original 40 series but with all the benefits of performance and low interior resonance from the Delta Flow technology. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability.
  • Suggested Purchase Quantity: 2
    • Most jobs typically require 2 of this item.

This Part Fits the Following OEM/Substitute Numbers:
953048

Additional Fitment Information:
Vehicle Block CC Engine CID
1999 - GMC C2500 V - 8 Cyl 6.5L 395

Flowmaster
  • 3.0 in. Center Inlet/Offset Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
  • 70 Series™ Big Block II Muffler; 3.0 in. Center Inlet/Offset Outlet; Case Dimensions 5 in. x 10 in. x 22 in.; 28 in. Overall Length; Aluminized Steel;
  • 70 Series™ Big Block II Muffler
  • Product Attributes:
    • Tip Quantity: 0
    • Automotive Item Grade: High Performance
    • Mount Type: Uses New Hangers (not Included)
    • Muffler Type: Reflection
    • Outlet Connection Type: Pipe
    • Outlet Position: Offset
    • Sound Level: Mild
    • WARNING CA Proposition 65: No
    • Fitment: Universal
    • Body Width: 10.000 In.
    • Muffler Series: 70 Series Big Block
    • Overall Length: 28.000 In.
    • Shape: Oval
    • Inlet Type: Single Center
    • Inlet Position: Center
    • Body Length: 22.000 In.
    • Inlet Connection Type: Pipe
    • Outlet Type: Single Offset Outlet
  • Features:
    • Durable Fully Welded 16ga Aluminized Steel
    • 3 Year Limited Warranty
    • Stock to Mild Exterior Exhaust Tone
    • Minimal Interior Resonance
    • Recommended For SUV/Trucks/Motorhomes/Tow Vehicles
    • Improved HP/TQ and Potential Mileage Improvement
    • Race Proven Patented Delta Flow® Technology
    • Premium Flowmaster Quality
  • The 70 series utilizes Flowmasters Delta Flow technology and an enlarged case for improved sound control along with mileage and power gains. Perfect for use on trucks, SUVs, RVs, tow vehicles and high performance street cars where space allows. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
  • Suggested Purchase Quantity: 2
    • Most jobs typically require 2 of this item.

Additional Fitment Information:
Vehicle Block CC Engine CID
1999 - GMC Sierra 1500 V - 8 Cyl 4.8L 294

Flowmaster
  • 2.25 in. Dual Inlet/3 in. Center Outlet; Case Dimensions 5 in. x 10 in. x 17 in.; 23 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required~Adapters Needed For OEM Exhaust
  • 50 Series™ SUV Muffler; 2.25 in. Dual Inlet/3 in. Center Outlet; Case Dimensions 5 in. x 10 in. x 17 in.; 23 in. Overall Length; Aluminized Steel;
  • 50 Series™ SUV Muffler
  • Product Attributes:
    • Tip Quantity: 0
    • Automotive Item Grade: High Performance
    • Mount Type: Uses New Hangers (not Included)
    • Muffler Type: Reflection
    • Outlet Connection Type: Pipe
    • Outlet Position: Center
    • Inlet Diameter: 2.250 In.
    • Sound Level: Mild
    • WARNING CA Proposition 65: No
    • Fitment: Universal
    • Body Width: 10.000 In.
    • Muffler Series: Super 50 Series
    • Overall Length: 23.000 In.
    • Inlet Inside Diameter: 2.250 In.
    • Main Piping Diameter: 2.250 In.
    • Shape: Oval
    • Inlet Type: Dual
    • Inlet Position: Dual
    • Body Length: 17.000 In.
    • Inlet Outside Diameter: 2.250 In.
    • Inlet Connection Type: Pipe
    • Outlet Type: Single Center Outlet
  • Features:
    • Durable Fully Welded 16ga Aluminized Steel
    • 3 Year Limited Warranty
    • Mild to Moderate Exterior Exhaust Tone
    • Minimal Interior Resonance
    • Excellent Choice for Large Displacement Vehicles
    • Improved HP/TQ and Potential Mileage Improvement
    • Race Proven Patented Delta Flow® Technology
    • Premium Flowmaster Quality
  • The Super 50 series muffler is a larger version of Flowmasters 50 series Delta Flow muffler. Originally designed for trucks and SUVs, it is also well suited to muscle car and high performance applications. In addition, the larger case size significantly reduces interior resonance and provides a deep, rich tone along with mileage and power gains. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
  • Suggested Purchase Quantity: 2
    • Most jobs typically require 2 of this item.

This Part Fits the Following OEM/Substitute Numbers:
12278

Additional Fitment Information:
Vehicle Block CC Engine CID
1999 - GMC C2500 V - 8 Cyl 5.7L 350

Flowmaster
  • 2.5 in. Diameter Sold In Pairs; Hardware/Hangers Are Required For Installation; Offset Inlet/Center Outlet Mufflers Required
  • Tailpipe Set; 2.5 in. Diameter Sold In Pairs; Hardware/Hangers Are Required For Installation; Offset Inlet/Center Outlet Mufflers Required;
  • Tailpipe Set
  • Product Attributes:
    • Exhaust Pipe Bend Type: Assorted
    • Tubing Diameter: 2.500 In.
    • Mount Type: Yes
    • Exit Position: Dual Side
    • Single or Dual: Dual
    • System Type: Tailpipe
    • WARNING CA Proposition 65: No
    • Heat Shield Attached: No
    • Muffler Part Number: Kit Only
  • Features:
    • Mandrel Bent 16 Gauge Aluminized Tubing
    • Dual Side Exit
    • 3 Year Limited Warranty
    • Premium Flowmaster Quality
    • Made in the USA
  • These Builder Series tailpipes are constructed from 2.50-inch mandrel-bent 16-gauge aluminized steel tubing for maximum flow, tuck up high in the chassis for good clearance and exit out the sides behind the rear wheels. Designed to be used with a Single Inlet/Dual 2.50-inch Outlet mufflers such as part# 9430452 (Super 44 Series) or 530552 (Super 50 Series) muffler. Covered by our 3-year Limited Warranty. Note: Some fitment may be necessary. Does Not include installation hardware or exhaust tips.

Additional Fitment Information:
Vehicle
1999 - GMC K1500

Flowmaster
  • Single; Dual Rear Same Side Exit; w/Dual Cats; Includes 2.5 in. Tailpipes/70 Series(TM) Big Block II Muffler/3 in. Logo Embossed Stainless Tips;50 State Legal / California Emissions Compliant w/Dual Catalytic Converters
  • American Thunder Cat Back Exhaust System; Single; Dual Rear Same Side Exit; w/Dual Cats; Includes 2.5 in. Tailpipes/70 Series™ Big Block II Muffler/3 in. Logo Embossed Stainless Tips;
  • American Thunder Cat Back Exhaust System
  • Product Attributes:
    • Tip Quantity: 2
    • Tubing Diameter: 2.500 In.
    • Exhaust Type: Single
    • California Proposition 65 Chemical Name 2: Chromium (hexavalent Compounds)
    • California Proposition 65 Chemical Name 1: Nickel (metallic)
    • Inlet Diameter: 2.000 In.
    • Sound Level: Moderate
    • WARNING CA Proposition 65: Yes
    • Exhaust Series: American Thunder
    • Heat Shield Attached: No
    • WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov
    • Exit Style: Straight
    • Muffler Series: 70 Series Big Block
    • Inlet Inside Diameter: N/a
    • Outlet Outside Diameter: 2.500 In.
    • Tail Pipe Diameter: 2.500 In.
    • Exit Position: Dual Rear Same Side
    • Muffler Count: 1
    • Single or Dual: Dual
    • System Type: Cat Back
    • Muffler Part Number: 530702
    • Outlet Diameter: 2.500 In.
  • Features:
    • Mandrel Bent 16ga Aluminized Tubing
    • Moderate to Aggressive Exterior Exhaust Tone
    • Includes Hangers And Hardware For Easy Installation
    • Dyno Tuned for Maximum Performance
    • Premium Flowmaster Quality
    • 3 Year Limited Warranty
    • Made in the USA
  • For the person who is looking for an aluminized steel cat-back exhaust system with an aggressive exterior tone and moderate interior tone. The American Thunder system is heavy 16-gauge mandrel-bent aluminized steel tubing for durability and maximum performance. Includes a aluminized steel 70 Series Big Block II performance muffler for that perfect blend of a deep aggressive exterior sound, with a moderate interior tone that wont drive you out of the cab when having a conversation. The dual 2.50-inch tailpipes clear the factory spare tire and give you two choices of exit locations. Straight out the back for that true dual look, or exiting out each side behind the rear wheels, which is ideal for towing. The system is finished off with a pair of highly polished 3.00-inch 304 stainless steel tips embossed with the Flowmaster name. Designed for an easy fit, these systems include all necessary parts, hardware and instructions for an easy installation you can do at home. Covered by our 3-year Limited Warranty. For those who prefer full stainless steel construction with a Lifetime Limited Warranty, check out part# 817470. Notes: Fits 2/4 wheel drive models with extended cab/short bed configuration 141-inch wheelbase.
  • Suggested Purchase Quantity: 2
    • Most jobs typically require 2 of this item.

This Part Fits the Following OEM/Substitute Numbers:
15750, 65520, 817470

Additional Fitment Information:
Vehicle Block CC Engine Bed Length Body CID
1999 - GMC C1500 V - 8 Cyl 5.7L 78.0 Extended Cab Pickup 350

Flowmaster
  • 2.75 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
  • 50 Series™ Big Block Muffler; 2.75 in. Dual Inlet/2.5 in. Dual Outlet; Case Dimensions 5 in. x 12 in. x 22 in.; 28 in. Overall Length; Aluminized Steel;
  • 50 Series™ Big Block Muffler
  • Product Attributes:
    • Tip Quantity: 0
    • Muffler Type: Reflection
    • Outlet Position: Dual
    • Inlet Diameter: 2.750 In.
    • Sound Level: Mild
    • WARNING CA Proposition 65: No
    • Fitment: Universal
    • Body Width: 12.000 In.
    • Inlet Type: Dual
    • Body Length: 22.000 In.
    • Inlet Outside Diameter: 2.750 In.
    • Inlet Connection Type: Pipe
    • Outlet Diameter: 2.500 In.
    • Mount Type: Uses New Hangers (not Included)
    • Automotive Item Grade: High Performance
    • Outlet Connection Type: Pipe
    • Muffler Series: 50 Series Big Block
    • Overall Length: 28.000 In.
    • Inlet Inside Diameter: 2.750 In.
    • Outlet Outside Diameter: 2.500 In.
    • Main Piping Diameter: 2.750 In.
    • Shape: Oval
    • Inlet Position: Dual
    • Outlet Type: Dual Outlet
  • Features:
    • Durable Fully Welded 16ga Aluminized Steel
    • 3 Year Limited Warranty
    • Aggressive And Powerful Exterior Exhaust Tone
    • Notable Interior Resonance
    • Excellent Street/Strip And Off Road Application
    • No Internal Packing To Blowout
    • The Original Two Chamber Design
    • Premium Flowmaster Quality
    • Minimal Interior Resonance
    • Improved HP
    • TQ and Engine Efficiency
  • The 50 Series Big Block muffler is made for more than just big cubic inch engine applications. Its large case size with internal tuning chamber provides mileage and power gains along with maximum sound control for a quiet interior tone, even under heavy loads. Well suited to heavy duty vehicles such as full size trucks, SUVs, RVs, and tow vehicles. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
  • Suggested Purchase Quantity: 2
    • Most jobs typically require 2 of this item.

Additional Fitment Information:
Vehicle Block CC Engine CID
1999 - GMC C2500 V - 8 Cyl 7.4L 454

Flowmaster
  • Super 40™ Delta Flow Muffler
  • 3.0 in. Offset Inlet/Offset Outlet; Case Dimensions 5 in. x 10 in. x 13.5 in.; 17.5 in. Overall Length; 409 Stainless Steel Not Direct Fit-Some Adaptation Required
  • Super 40™ Delta Flow Muffler; 3.0 in. Offset Inlet/Offset Outlet; Case Dimensions 5 in. x 10 in. x 13.5 in.; 17.5 in. Overall Length; 409 Stainless Steel;
  • Super 40(TM) Delta Flow Muffler
  • Product Attributes:
    • Tip Quantity: 0
    • Automotive Item Grade: High Performance
    • Mount Type: Uses New Hangers (not Included)
    • Muffler Type: Reflection
    • California Proposition 65 Chemical Name 2: Chromium (hexavalent Compounds)
    • Outlet Connection Type: Pipe
    • California Proposition 65 Chemical Name 1: Nickel (metallic)
    • Outlet Position: Offset
    • Sound Level: Aggressive
    • WARNING CA Proposition 65: Yes
    • Fitment: Universal
    • Body Width: 10.000 In.
    • WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov
    • Muffler Series: Super 40 Series
    • Overall Length: 19.500 In.
    • Shape: Oval
    • Inlet Type: Single Offset
    • Inlet Position: Offset
    • Body Length: 13.500 In.
    • Inlet Connection Type: Pipe
    • Outlet Type: Single Offset Outlet
  • Features:
    • Durable Fully Welded 16ga Stainless Steel
    • Limited Lifetime Warranty
    • Deep Aggressive to Moderate Exhaust Note
    • Moderate Interior Resonance
    • Excellent Performance On High Horsepower Vehicles
    • Race Proven Patented Delta Flow® Technology
    • No Internal Packing To Blowout
    • Premium Flowmaster Quality
  • Developed from our Top Ten race muffler lineup for use on the street/strip, the Super 40 features Flowmasters Delta Flow technology. Its larger case profile provides the best of both worlds of performance and sound, especially on forced induction and high horsepower vehicles. The Super 40 has that deep powerful sound of the Original 40 series but with all the benefits of performance and low interior resonance from the Delta Flow technology. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability.
  • Suggested Purchase Quantity: 2
    • Most jobs typically require 2 of this item.

Additional Fitment Information:
Vehicle Block CC Engine CID
1999 - GMC C2500 V - 8 Cyl 6.5L 395

Flowmaster
  • 3.0 in. Center Inlet/Offset Outlet; Case Dimensions 5 in. x 10 in. x 17 in.; 23 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
  • 50 Series™ SUV Muffler; 3.0 in. Center Inlet/Offset Outlet; Case Dimensions 5 in. x 10 in. x 17 in.; 23 in. Overall Length; Aluminized Steel;
  • 50 Series™ SUV Muffler
  • Product Attributes:
    • Tip Quantity: 0
    • Automotive Item Grade: High Performance
    • Mount Type: Uses New Hangers (not Included)
    • Muffler Type: Reflection
    • Outlet Connection Type: Pipe
    • Outlet Position: Offset
    • Sound Level: Mild
    • WARNING CA Proposition 65: No
    • Fitment: Universal
    • Body Width: 10.000 In.
    • Muffler Series: Super 50 Series
    • Overall Length: 23.000 In.
    • Shape: Oval
    • Inlet Type: Single Center
    • Inlet Position: Center
    • Body Length: 17.000 In.
    • Inlet Connection Type: Pipe
    • Outlet Type: Single Offset Outlet
  • Features:
    • Durable Fully Welded 16ga Aluminized Steel
    • 3 Year Limited Warranty
    • Mild to Moderate Exterior Exhaust Tone
    • Minimal Interior Resonance
    • Excellent Choice for Large Displacement Vehicles
    • Improved HP/TQ and Potential Mileage Improvement
    • Race Proven Patented Delta Flow® Technology
    • Premium Flowmaster Quality
  • The Super 50 series muffler is a larger version of Flowmasters 50 series Delta Flow muffler. Originally designed for trucks and SUVs, it is also well suited to muscle car and high performance applications. In addition, the larger case size significantly reduces interior resonance and provides a deep, rich tone along with mileage and power gains. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
  • Suggested Purchase Quantity: 2
    • Most jobs typically require 2 of this item.

Additional Fitment Information:
Vehicle Block CC Engine CID
1999 - GMC Sierra 1500 V - 8 Cyl 4.8L 294

Flowmaster
  • 50 Series™ SUV Muffler
  • 3.0 in. Center Inlet/Offset Outlet; Case Dimensions 5 in. x 10 in. x 17 in.; 23 in. Overall Length; Aluminized Steel Not Direct Fit-Some Adaptation Required
  • 50 Series™ SUV Muffler; 3.0 in. Center Inlet/Offset Outlet; Case Dimensions 5 in. x 10 in. x 17 in.; 23 in. Overall Length; Aluminized Steel;
  • 50 Series(TM) SUV Muffler
  • Product Attributes:
    • Tip Quantity: 0
    • Automotive Item Grade: High Performance
    • Mount Type: Uses New Hangers (not Included)
    • Muffler Type: Reflection
    • Outlet Connection Type: Pipe
    • Outlet Position: Offset
    • Sound Level: Mild
    • WARNING CA Proposition 65: No
    • Fitment: Universal
    • Body Width: 10.000 In.
    • Muffler Series: Super 50 Series
    • Overall Length: 23.000 In.
    • Shape: Oval
    • Inlet Type: Single Center
    • Inlet Position: Center
    • Body Length: 17.000 In.
    • Inlet Connection Type: Pipe
    • Outlet Type: Single Offset Outlet
  • Features:
    • Durable Fully Welded 16ga Aluminized Steel
    • 3 Year Limited Warranty
    • Mild to Moderate Exterior Exhaust Tone
    • Minimal Interior Resonance
    • Excellent Choice for Large Displacement Vehicles
    • Improved HP/TQ and Potential Mileage Improvement
    • Race Proven Patented Delta Flow® Technology
    • Premium Flowmaster Quality
  • The Super 50 series muffler is a larger version of Flowmasters 50 series Delta Flow muffler. Originally designed for trucks and SUVs, it is also well suited to muscle car and high performance applications. In addition, the larger case size significantly reduces interior resonance and provides a deep, rich tone along with mileage and power gains. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
  • Suggested Purchase Quantity: 2
    • Most jobs typically require 2 of this item.

Additional Fitment Information:
Vehicle Block CC Engine CID
1999 - GMC Sierra 1500 V - 8 Cyl 4.8L 294

Flowmaster
  • Single; Dual Rear Same Side Exit Includes 2.5 in. Outlets/40 Series(TM) Muffler/Tube Extensions/3.0 in. Logo Embossed Stainless Tips;50 State Legal / California Emissions Compliant With Single Flanged Catalytic Converter
  • American Thunder Cat Back Exhaust System; Single; Dual Rear Same Side Exit Includes 2.5 in. Outlets/40 Series™ Muffler/Tube Extensions/3.0 in. Logo Embossed Stainless Tips;
  • American Thunder Cat Back Exhaust System
  • Product Attributes:
    • Tip Quantity: 2
    • Tubing Diameter: 2.500 In.
    • Exhaust Type: Single
    • California Proposition 65 Chemical Name 2: Chromium (hexavalent Compounds)
    • California Proposition 65 Chemical Name 1: Nickel (metallic)
    • Sound Level: Moderate
    • WARNING CA Proposition 65: Yes
    • Exhaust Series: American Thunder
    • Heat Shield Attached: No
    • WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov
    • Exit Style: Straight
    • Muffler Series: Super 40 Series
    • Inlet Inside Diameter: 2.500 In.
    • Outlet Outside Diameter: 2.500 In.
    • Tail Pipe Diameter: 2.500 In.
    • Exit Position: Dual Rear Same Side
    • Muffler Count: 1
    • Single or Dual: Dual
    • System Type: Cat Back
    • Muffler Part Number: Kit Only
    • Outlet Diameter: 2.500 In.
  • Features:
    • Mandrel Bent 16 Gauge 409 Stainless Tubing
    • Includes Hangers And Hardware For Easy Installation
    • Dyno Tuned for Maximum Performance
    • Premium Flowmaster Quality
    • 3 Year Limited Warranty
    • Made in the USA
  • This Flowmaster system is for the person who is looking for a stainless steel cat-back exhaust system with an aggressive exterior tone and moderate interior tone for the 1999 to 2007* (2007 Classic Only) GM 1500 Extended Cab/Short Bed trucks with the 4.3L, 4.8L or 5.3L engines. The American Thunder system is heavy 16-gauge mandrel-bent stainless steel tubing for durability and maximum performance. Includes a stainless steel Super 40 Series performance muffler for that perfect blend of a deep aggressive exterior sound, with a moderate interior tone that wont drive you out of the cab when having a conversation. The dual 2.50-inch tailpipes clear the factory spare tire and give you two choices of exit locations. Straight out the back for that true dual look, or exiting out each side behind the rear wheels, which is ideal for towing. The system is finished off with a pair of highly polished 304 stainless steel tips embossed with the Flowmaster name. Designed for an easy fit, these systems include all necessary parts, hardware and instructions for an easy installation you can do at home.
  • Suggested Purchase Quantity: 2
    • Most jobs typically require 2 of this item.

This Part Fits the Following OEM/Substitute Numbers:
140198, 15792, 17428, 65543, S5016409

Additional Fitment Information:
Vehicle Block CC Engine Bed Length Body CID
1999 - GMC Sierra 1500 V 5328 8 Cyl 5.3L 78.0 Extended Cab Pickup 325
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