I am getting HKR 2055's and a magnaflow 332019 3 in cat, but im looking for a 3 in cat back exhaust that is'nt too loud. I work nights and I don't want to wake up my entire neighborhood when I go home.

 

Magnaflow is pretty quiet. Walker is almost stock quiet but I don't know if they make a 3in inlet. Id try to keep everything 3in.

 

3” straight through, magnaflow, vibrant Street SS, Jones max flow all work well and have the lowest DB without being restrictive.

install a cutout with a separate muffler for the sound you want when away from home and do a super quiet muffler in the stock location. Best of both worlds.

 

That's been pretty much my approach, a dynomax ultraflow welded in the stock location, it's stock quiet, maybe quieter, but flows as well as anything out there. I eventually got tired of always having a quiet car and installed a cutout, which I can crack open or more and adjust volume for my mood (closed while negotiating the race, WFO Full Freaking Racecar mode while running, closed again when you need to be discreet afterward 😉 ). Now after years of this setup my Ultraflow is rotting out so I'm looking for a replacement.

 

This is the Summit Racing 3" exhaust with headers and no catalytic converter. It's not obnoxiously loud and would probably be mild with a cat in place.

 

How was fitment on your overaxle pipe? Mine was ok but wasn't great. I was shocked to see the hawks sinister 4" (Mufflex) had better fitment and cleared all the stock components (upper PHB).

 

Fit was good on my system.