Stainless steel 4.5" Slip fit to stock or aftermarket exhaust O2 bungs Huge gains with tune Multiple options Note: This Catless downpipe is intended for racing and competition purposes only and is not suitable for street applications. O2 simulators may be required if a Check Engine Light (CEL) is triggered. OFF-ROAD USE ONLY - PRODUCTS FOR OFF-ROAD USE AND MAY NOT COMPLY WITH REGULATIONS FOR ON-ROAD DRIVING. IF USED ON PUBLIC ROADS, YOU MAY RISK NON-COMPLIANCE WITH SAFETY, EMISSIONS, AND SMOG REGULATIONS, AND WE DO NOT ACCEPT RESPONSIBILITY FOR ANY RESULTING LEGAL ISSUES. IT IS YOUR RESPONSIBILITY TO ENSURE COMPLIANCE WITH LOCAL LAWS AND EMISSIONS TESTING. BY PURCHASING AND USING OUR PRODUCTS, YOU ACKNOWLEDGE THAT YOU ASSUME FULL RESPONSIBILITY FOR ANY CONSEQUENCES, AND WE APPRECIATE YOUR UNDERSTANDING AND COMPLIANCE WITH OUR INTENDED USE POLICY.