This is our 3 chambered quiet resonator for those who already have our catback exhaust system and want to clamp it into your existing system. Choose from the drop downs for 3" or 2.5". The 3" option will have a 3" bolt in flange and a 3" exit (intended for our 3" catback). The 2.5" option will have a 2.5" bolt in flange and a 2.5" exit (intended for our 2.5" catback).

If you are handy and can weld yourself please look at our resonator in the universal exhaust section. This specific product is fabricated with the flange like your old style resonator or non resonated catback exhaust piece where you would simply unclamp and remove your old pipe and replace that entire section with this section. 

This will by greatly reduce the volume and drone while cruising that is common on naturally aspirated or supercharged Cobalts and Redlines, but still have a nice sound of power when you get on the throttle. 

This is made to bolt up to our ZZP catback exhaust systems. This will not bolt up to a different brand exhaust or stock exhaust.