817104 Flowmaster® is proud to introduce our American Thunder® dual exhaust system for 1967-1974 Chevrolet Camaro, Pontiac Firebird and 1968-1974 Chevrolet Nova's. This all stainless steel exhaust system features our exclusive design 80 Series™ Crossflow muffler, all mandrel-bent dual 2.50-inch pipes including an H-pipe crossover for a deep smooth tone that also minimizes any back-rap on deceleration. The dual 2.50-inch stainless steel tailpipes provide a deep rich sound and optimum performance. This crossmember-back 409S stainless system gives these classic muscle cars a moderate tone inside and out. Using the crossflow design, this exhaust places the muffler in the factory location behind the rear axle retaining full ground clearance under the car while offering all the performance benefits of a full dual exhaust system. The system includes all parts, hardware and illustrated instructions, and like all Flowmaster stainless steel street products, it includes our Limited Lifetime Warranty. Features: H-pipe Crossover for Maximum Power and Deep Tone Includes Hangers and Hardware for Easy Installation 80 Series Cross-flow Performance Muffler Mandrel-bent Stainless Steel Tubing Moderate Exterior Exhaust Tone Maximum Ground Clearance Stainless Steel Construction Lifetime Limited Warranty Crossmember-back System 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 Out Rear Heat Shield No Inlet Diameter (in) 2.5 Material 409 Stainless Steel Muffler Part Number Kit Only Muffler Quantity 1 Muffler Series 80 Series Crossflow Outlet Diameter (in) 2.5 Product Type Exhaust System Single Dual Dual Sound Level Moderate System Type Crossmember-back Tip Quantity Not Included Tube Diameter 2.5 inch Tubing Diameter (in) 2.5 Type of Exhaust Crossmember-back UPC 700042024773 California Proposition 65 Chemical Name Chromium (hexavalent compounds) Nickel (Metallic) California Proposition 65 Required Yes Part Number 817104 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# 817104 Warranty for Part# 817104 Convertible models require 3/8-inch of shims on the factory X-brace for clearance of the exhaust tubing.