17129 This American Thunder system is specially designed for 1967-1968 Camaro and Firebirds and is perfect for the person looking for a complete crossmember-back dual exhaust system. With an easy-fit in mind, this exhaust system is manufactured as a true dual exhaust using 2.50-inch aluminized steel tubing throughout, includes a built-in H-pipe design and delivers improved throttle response, power with a deep muscle car sound. The mandrel-bent tubing flows into a pair of Super 44 mufflers with 2.50-inch tailpipes exiting in the factory location behind the rear wheels pointing down just below the quarter panel. The system delivers a moderate to aggressive interior and exterior tone that's suited for the enthusiast who wants their performance to be heard. Designed for an easy fit, these systems include all necessary parts, hardware, and instructions. If you prefer Stainless steel construction, check out optional system# 817129. Notes: Fits convertibles by spacing down the factory convertible body brace by approximately .375-inch, or you can replace the factory body brace with a Hotchkis Performance body brace part #1404. Features: Includes Hangers and Hardware for an Easy Installation Mandrel-bent 16-gauge Aluminized Steel Tubing Moderate to Aggressive Exterior Exhaust Tone Complete Crossmember-Back Exhaust System Super 44 Series Performance Mufflers Tailpipes Exit in the Factory Location Includes H-pipe Assembly Flowmaster Quality About Flowmaster Flowmaster® is a household name, and for good reason. They've built legendary exhaust systems and mufflers for decades, and now offer performance air intakes, catalytic converters, and headers to give your hot rod performance to match the iconic Flowmaster sound. SPECS 2WD/4WD 2WD Brand Flowmaster Emission Code 5 Exhaust Series American Thunder Exit Position Dual Side Exit Heat Shield No Inlet Diameter (in) 2.5 Material Aluminized Steel Muffler Part Number 942546 Muffler Quantity 2 Muffler Series Super 44 Series Outlet Diameter (in) 2.5 Product Type Exhaust System Single Dual Dual Sound Level Aggressive / Moderate System Type Crossmember-back Tip Quantity Not Included Tubing Diameter (in) 2.5 UPC 700042014538 California Proposition 65 Required No Part Number 17129 EMISSIONS 5 This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations. TECH RESOURCES Instructions for Part# 17129 Warranty for Part# 17129 Fits 1967-1968 Chevrolet Camaro and Pontiac Firebird with V8 engine. Does not fit convertibles without modifications or replacement to the factory X-brace. See notes in description.