For the person who wants the aggressive look of a NASCAR race truck along with all the benefits that a Flowmaster Cat-back exhaust system provides. D.O.S.S. (Dual out same side) systems are the perfect choice. The American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The exhaust system is constructed from 3.00-inch mandrel-bent aluminized steel tubing flowing into a Super 40 Series performance muffler for a deep powerful sound, then is finished off with dual 2.50-inch tailpipes and a pair of 3.00-inch polished stainless steel tips. Includes all necessary hardware, instructions and is covered by our 3-year Limited Warranty. For those who prefer full stainless steel construction and a Lifetime Limited Warranty, check out part# 817395. Notes: Fits both 2/4 wheel drive models with extended cab/short bed configuration on a 143.5-inch wheelbase.
Fits 1999-2007* (*2007 Classic Only) Chevrolet Silverado and GMC Sierra 1500 truck with 4.8L or 5.3L engine, fits 2/4 wheel drive models with extended cab/short bed configuration on a 143.5-inch wheelbase.
Fits 1999-2007* (*2007 Classic Only) Chevrolet Silverado, GMC Sierra 1500 trucks with 4.8L or 5.3L engine. Extended Cab/Short Bed Only - Aggressive sound
Flowmaster 99-06 GM 1500 ECB 143.5in. American Thunder Cat-Back Exhaust System
Includes Hangers and Hardware for an Easy Installation
Flowmaster American Thunder Cat-back Exhaust System
Mandrel-bent 16-gauge Aluminized Steel Tubing
Moderate to Aggressive Exterior Exhaust Tone
Dual 3.00-inch Polished Stainless Steel Tips
Super 40 Series Performance Muffler
Dyno Tuned for Maximum Performance
Uses the Factory Hanger Locations
9906 GM 1500 ECSB 1435 DOSS
Quick and Easy Installation
SYS 99-06 GM 1500 EC
SYS 99-06 GM
