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Flowmaster American Thunder Crossmember-Back Exhaust System for Chevrolet and GMC

Part # 817940

  • Crossmember-Back Design Works with Stock Manifolds or Headers, Allowing More Application Options
  • 16-Gauge, 2.50-Inch 409 Stainless Steel Pipes add Durability and Strength
  • Super 44 Mufflers Deliver Increased Performance and an Aggressive to Moderate Sound Level
  • Three Different Tailpipe Exit Options Allow You to Tailor the Look of the Kit to Your Style
  • Mandrel-Bent Pipes Help to Maximize the Exhaust Flow for Better Performance
  • H-Pipe Style Crossover Helps Exhaust Gas Scavenging and Reduces Drone
  • Includes Hangers and Hardware for Installation
  • Lifetime Limited Warranty

Description

This Flowmaster American Thunder dual exhaust system is specifically designed for 1967-1972 Chevrolet and GMC K10, K15/K1500, K20, and K25/K2500 4wd trucks with V8 engines. The system is perfect for the person looking for an aggressive to moderate interior and exterior sound level. Starting at the Crossmember-Back, the exhaust comes complete with a built-in H-pipe crossover for better exhaust scavenging, all mandrel-bent 2.50-inch stainless steel tubing, a pair of Super 44 Series performance mufflers, and your choice of three tailpipe exits (Turndown behind rear tires, side exit behind rear tires, or straight out the back under the bumper). The system includes all hardware necessary for installation and is covered by our Lifetime Limited Warranty. Fits both short and long wheelbase trucks.

Specifications

CARB (California) CompliantYes
Catalytic Converter IncludedNo
Catalytic Converter Quantity0
Clamping TypeFlat Band
Clamps IncludedYes
Exhaust SeriesAmerican Thunder
Exhaust Tip Quantity0
Exhaust Tip ShapeRound
Exit StyleDual Out Side
FinishNatural
Gasket Or Seal IncludedNo
Grade TypePerformance
Hangers IncludedYes
Heat Shield IncludedNo
Inlet TypeWeld-On
Main Piping Diameter2.50 in
Mount TypeUses New Hangers (Included)
Mounting Bracket IncludedYes
Muffler (Left) Body Height4.00 in
Muffler (Left) Body Length13.25 in
Muffler (Left) Body Width9.50 in
Muffler (Left) TypeChambered
Muffler (Right) Body Height4.00 in
Muffler (Right) Body Length13.25 in
Muffler (Right) Body Width9.50 in
Muffler (Right) TypeChambered
Muffler Body Height4.00 in
UPC / GTIN00090127117200
WarrantyManufacturer's Limited Lifetime Warranty

Fits these vehicles

YearMakeModelSubmodelEngineNote
1967ChevroletK10 PickupBase4.6L V8, 5.3L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
1968ChevroletK10 PickupBase5.0L V8, 5.3L V8, 5.4L V8, 6.5L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
1969ChevroletK10 PickupBase5.0L V8, 5.3L V8, 5.7L V8, 6.5L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
1970 - 1972ChevroletK10 PickupBase5.0L V8, 5.7L V8, 6.6L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
1967ChevroletK20 PickupBase4.6L V8, 5.3L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
1968ChevroletK20 PickupBase5.0L V8, 5.3L V8, 5.4L V8, 6.5L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
1969ChevroletK20 PickupBase5.0L V8, 5.3L V8, 5.7L V8, 6.5L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
1970 - 1972ChevroletK20 PickupBase5.0L V8, 5.7L V8, 6.6L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
1967GMCK15/K1500 PickupBase4.6L V8, 5.3L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
1968GMCK15/K1500 PickupBase5.0L V8, 5.3L V8, 5.4L V8, 6.5L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
1969GMCK15/K1500 PickupBase5.0L V8, 5.7L V8, 6.5L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
1970 - 1972GMCK15/K1500 PickupBase5.0L V8, 5.7L V8, 6.6L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
1967GMCK25/K2500 PickupBase4.6L V8, 5.3L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
1968GMCK25/K2500 PickupBase5.0L V8, 5.3L V8, 5.4L V8, 6.5L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
1969GMCK25/K2500 PickupBase5.0L V8, 5.7L V8, 6.5L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.
1970 - 1972GMCK25/K2500 PickupBase5.0L V8, 5.7L V8, 6.6L V8Aggressive to Moderate sound; Super 44 Series Performance Mufflers; 2.50-inch Stainless Steel Pipes.