3" Stainless Cobalt Catback Exhaust

This is our ZZP 3" cat back exhaust for your LSJ/LE5. Stainless Steel Mandrel Bent Optional Resonator (recommended for supercharged or N/A builds) Polished 3 Chamber muffler 1/2" Hangers in all OEM locations Includes all required clamps, gasket, & bolts Direct bolt in when used with our 3" exit downpipe During the testing phase we setup an RTA to measure db levels at various frequencies and rpm ranges . Time consuming to say the least but in the end we came up with a solution which we now manufacture in stainless. Remember that this is a 3" exhaust, it will be much louder than stock. Also it will be even louder if you do not chose the resonator option and run a catted downpipe. This is a very good sounding exhaust when you order it with the resonator and muffler options. However, we recommend our 2.5" catback for most builds, found here.  Fits the 2005-07 2.0 (LSJ), 2005-2010 2.2 & 2.4L Cobalt's; also fits 07-10 Pontiac G5.July 2025 update: We have updated our muffler secti