Namely, it replaces the rear axle-back and tips and then a portion of what we refer to as the mid-pipes. This system is emissions friendly and doesn’t require any tuning. In New Jersey, vehicles must pass emissions testing to ensure they meet environmental standards. Since cat-back exhaust systems do not modify the catalytic converter or engine management system, they generally do not affect a vehicle’s ability to pass emissions testing.

When used in the context of aftermarket parts or performance upgrades, “cat-back” is used to indicate which section of the exhaust system the parts replace. Cat-back systems are available as both single- and dual-exhaust. All Thermal R&amp