Gibson Cat-Back Exhaust System Single Stainless Extended Cab 7.4L Chevrolet Silverado 3500/ GMC Sierra 3500 1988-1989
Highlights
- 32 HP Gains
- Maximum Hill Climbing
- Bolt On
- Made in the USA
Gibson Single Stainless Cat-Back Exhaust System for 1988-1989 Extended Cab Chevrolet Silverado 3500s and GMC Sierra 3500s with a 7.4L Engine.
The best exhaust systems should look like lightning and rumble like thunder. Gibson's polished stainless tip offers a striking visual appeal while the baffled and chambered muffler produces a deep sound.
Bolt the Gibson Single Stainless Cat-Back Exhaust System (615556L) right onto your 1988-1989 Extended Cab Chevrolet Silverado 3500 or GMC Sierra 3500 with a 7.4L engine.
Features and Benefits:
- Aggressive Exhaust Tone
- 32 Horsepower Gains
- 60 ft/lbs Torque Increase
- Easy Bolt-On Installation
- Polished Stainless Tip
- Proudly Made in the USA!
Dyno-tested results reveal 32 horsepower gains and an extra 60 ft/lbs of torque in Gibson's Stainless System. It supports improved acceleration, maximum hill climbing, towing and passing power. The tip exits behind the rear tire, near the stock location for professional-looking results.
California Residents: Proposition 65 Warning




