For the person who wants the look of a traditional dual exhaust system with all the benefits that a Flowmaster® cat-back exhaust system provides. The American Thunder® exhaust systems are the perfect choice for the person wanting a deep powerful tone outside, with a mild to moderate increase of sound inside the cab. The exhaust system features a dual inlet flange that attaches to the factory flange behind the catalytic converters, all mandrel-bent stainless steel tubing flowing into a Scavenger Series Y-pipe for maximum scavenging of exhaust resulting in increased torque. The system then flows into a 70 Series™ "Big Block II" performance muffler giving you a deep powerful tone outside, and mild to moderate interior tone inside the cab. The dual tailpipes can be configured for either dual out the rear under the bumper for a muscular look, or dual out the sides behind the rear wheels, which is ideal for towing applications. The tailpipes are then finished off with a pair of 3.00-inch polished 304 stainless steel tips. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for an easy installation and is covered by our Lifetime Limited Warranty. Note: Fits 2 and 4 wheel drives with the extended cab/shortbed chassis.
Features:
- Includes Hangers and Hardware for an Easy Installation
- Mandrel-bent 16-gauge Stainless Steel Tubing
- Dual 3.00-inch Polished Stainless Steel Tips
- Connects After Factory Catalytic Converter
- Covered by our Lifetime Limited Warranty
- Deep Powerful Exterior Exhaust Tone
- Uses the Factory Hanger Locations
- 70 Series Performance Muffler
- Lifetime Limited Warranty
- Includes all Hardware
- Easy Installation
Fits 1996-1999 Chevrolet Silverado, GMC Sierra 1500 trucks with the 5.7L engine using dual catalytic converters, fits extended cab/short bed configuration.
Installation Notes:
Fits 1996-1999 Chevrolet Silverado, GMC Sierra 1500 trucks with the 5.7L engine using dual catalytic converters, fits extended cab/short bed configuration.
About Flowmaster
Manufacturer of performance exhaust systems, mufflers, performance air intakes, turbo boost modules, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 5 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.

Vehicle Fitment:
The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make |
Model |
Submodel |
Years |
Engine |
Fitment Notes |
Chevrolet |
C1500 |
Base |
1996 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
C1500 |
Base |
1997 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
C1500 |
Cheyenne |
1996 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
C1500 |
Cheyenne |
1997 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
C1500 |
Cheyenne |
1998 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
C1500 |
LS |
1999 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
C1500 |
Silverado |
1996 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
C1500 |
Silverado |
1997 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
C1500 |
Silverado |
1998 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
K1500 |
Base |
1996 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
K1500 |
Base |
1997 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
K1500 |
Cheyenne |
1996 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
K1500 |
Cheyenne |
1997 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
K1500 |
Cheyenne |
1998 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
K1500 |
LS |
1999 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
K1500 |
Silverado |
1996 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
K1500 |
Silverado |
1997 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
Chevrolet |
K1500 |
Silverado |
1998 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
C1500 |
Sierra SLE |
1996 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
C1500 |
Sierra SLE |
1997 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
C1500 |
Sierra SLE |
1998 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
C1500 |
Sierra SLE |
1999 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
C1500 |
Sierra SLT |
1996 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
C1500 |
Sierra SLT |
1997 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
C1500 |
Sierra SLT |
1998 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
C1500 |
Sierra SLT |
1999 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
C1500 |
Sierra SL |
1996 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
C1500 |
Sierra SL |
1997 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
C1500 |
Sierra SL |
1998 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
C1500 |
Sierra SL |
1999 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
K1500 |
Sierra SLE |
1996 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
K1500 |
Sierra SLE |
1997 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
K1500 |
Sierra SLE |
1998 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
K1500 |
Sierra SLT |
1996 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
K1500 |
Sierra SLT |
1997 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
K1500 |
Sierra SLT |
1998 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
K1500 |
Sierra SL |
1996 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
K1500 |
Sierra SL |
1997 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |
GMC |
K1500 |
Sierra SL |
1998 |
5.7L / 350 / V8 |
With Dual Catalytic Converter. Extended cab/Short bed only. |