I'm looking to do the exhaust on my 2005 Monte Carlo LS. I'm looking to definitely get Ported Exhaust Manifolds and a 2.5" downpipe with cat both from Milzy Motorsports. I'm wondering what I should do for cat back.....ZZP 2.5" or go custom from say Lou's Exhaust?

 

Is your stock catback piping destroyed / rusted through? If not, I'd consider just doing a muffler / res swap. Its pretty expensive to replace every bit of the piping and there's no real power gain / benefit at all either way anyways.

 

Personally I would just do a u-bend delete and be done. Milzy had developed a negative reputation over the last several years so I would suggest just the ubend delete and universal high flow cat. Its going to be the same result as a downpipe but cheaper. You can even use exhaust clamps if you dont have a welder, they work fine.

 

Ok, I was thinking of getting the ZZP U-bend delete, high flow cat, and a custom 2.5" cat back