Flowmaster American Thunder SS Exhaust fits 01-04 Silverado Sierra HD 817328

For the person who wants a subtle custom appearance with all the benefits that a Flowmaster Cat-back exhaust system provides. SOS. (Single out side) systems are the perfect choice. 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. 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 easy installation.

• Aggressive Sound Exterior Exhaust Tone
• Includes hangers and hardware for easy installation
• Connects After Factory Catalytic Converter
• Mandrel bent 16 gauge stainless steel tubing

Note 1: Extended Cab and Crew Cab only

Note 2: Factory Dual Inlet Muffler Only

Fits 2001 to 2004 Chevrolet and GMC trucks on a 3/4 Ton or 1 Ton HD chassis with a 6.0L or 8.1L engine, fits Extended Cab and Crew Cab models.