kaldous4421

How's the sound if you just do straight pipes off the rear two cats?

jayson_waltz

I've always wondered this same question. Will hollowing the rear cats and putting them back in change much? I mean it should be louder after that but will there be more rasp or any MPG loss? I love the way my exhaust sounds now note wise i just wish it was a little louder, and rasp makes any exhaust system sound like s**t imo.

JCP281

It makes the exhaust note deeper and louder, with a lot less rasp than if you just got a midpipe without any cats.

You wont lose any MPG from it, if anything you would gain a fraction of a MPG due to a little less restriction.

jayson_waltz

^sounds good, just what i was wanting to hear. I hate rasp so that was the main thing i wanted to avoid.

AZFX4

The 2 elbow "cats" are just resonators. Hollow them or replace them with a piece of pipe and your good to go. It won't throw any codes.. the 2 front cats will cause emission problems and codes..

Duckslayer08

so do i remove the 2 forward cats or the rear cats

DIABL0

rear

Duckslayer08

sweet looks like ive got a weekend project with my welding machine

howerton31

Well I ended up cutting off the 2 back cats and replaced them with flex pipe. Gave it a little tone, not alot but about what I was looking for. Have drove 100 miles and havent thrown any codes. Thanks everybody.

formula150nh

youd probaly get better gas milage