817674 The new Flowmaster American Thunder cat-back exhaust system for the 2007-2018 Jeep Wrangler JK is perfect for the person looking for maximum performance and off-road ground clearance. This system replaces the factory transverse muffler and relocates the Super HP-2 muffler behind the factory catalytic converter, providing a moderate to aggressive sound level. The system features a mandrel-bent 2.50-inch stainless steel tailpipe with a 3.00-inch polished stainless steel tip tucked up high under the rear bumper for maximum clearance. Fits both 2 and 4 door models with either the 3.8L or 3.6L engines. Because the tailpipe is tucked up so high, an aftermarket metal bumper is recommended. The exhaust system is covered by our Lifetime Limited Warranty and includes all necessary parts and hardware for an easy installation you can do at home. Features: Provides Maximum Clearance for Off-Road Driving Super HP2 Laminar Flow Technology Uses the Factory Hanger Locations Stainless Steel Construction Quick and Easy Installation Lifetime Limited Warranty 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 RWD/4WD Brand Flowmaster Emission Code 5 Exhaust Series American Thunder Exit Position Single Rear Exit Heat Shield No Inlet Diameter (in) 2.5 Material 409 Stainless Steel Muffler Part Number Kit Only Muffler Quantity 1 Muffler Series Super HP-2 Outlet Diameter (in) 2.5 Product Type Exhaust System Single Dual Dual Sound Level Aggressive / Moderate System Type Cat-back Tip Diameter (in) 3 Tip Length (in) 3.75 Tip Quantity 1 Tubing Diameter (in) 2.5 UPC 700042030385 California Proposition 65 Chemical Name Chromium (hexavalent compounds) Nickel (Metallic) California Proposition 65 Required Yes Part Number 817674 Instructions for Part# 817674 Warranty for Part# 817674