Porsche Ober

I was wondering how much bigger of a difference a cat delete would be on factory 2.5 exhaust? Is it much louder? Does it sound ricey? I have a high mileage turbo, so Im thinking that it will help it a fair amount. thoughts/experience? Should I just save for 3" with a test pipe?

refresh951

I replaced my cat with a 2.5" test pipe I bought from Pelican. From what I understand if you are not planning on heavy mods then flow is adequate with the 2.5" exhaust. I think this is a low cost power increase. Maybe someone else can be more specific about how much HP increase would be typical.

TheLlamaGod

i run 2.5 test pipe and no muffler and i love how it sounds. it is pretty loud though
i can post a vid if u want.
i dont know how much it did performance wise but it sure does sound like im going faster

ehall

If your current cat is original, which means clogged up and worn out, then you should feel a performance difference. How much? Don't know. If the muffler stays in place, the cat delete shouldn't make much difference in sound.

max_boost951

I's say should pull the old catalytic converter delete kit out of the box. Ricers i believe have/use 1/16" pipes and glass packs......

dirtyTurbo

I "cleaned out" my cat, meaning it's hollow and not a test pipe like I should have done. Absolutely no difference in sound

Black51

People behind you at a light won't appreciate the exhaust smell, that I can tell you... I was sitting at a light once last year when a guy on a bike stopped behind me, and started frantically wafting his hand in front of his face once he stopped. Poor bastard...

jc in rb

I remove mine after smog, and can feel a diference. Boost seems to come on a bit faster.that and cats are expensive and should be saved for smog check.

schip43

I think a test pipe is at the least the minimum exhaust upgrade, if you keep the stock muffler in place the exhaust has a deeper bubblier tone at idle and a deeper tone at speed. And no it does not sound rice at all.

Tay-Tay

^^agreed and faster spool. Go for it, it's MUCH cheeper than a 3". IMO w/ zero to minimal mods you will not get much more out of a 3 than a 2.5 w/ test pipe.

Porsche Ober

ihaza944t, are you suggesting that this was a bad idea? I was toying with this notion as well...it is the cheapest of options.

Great advice! Thanks guys! We have no emissions testing, so I'm not too worried about the cat remaining in tact.

Porsche Ober

I love videos...

gregeast

I have a used Bursch test pipe for sale if you decide to go this route. $200 + shipping.

I ran this for several years and it made a noticeable difference in spool up and while it's louder than with the cat in place I wouldn't say it is loud, it's actually nice to hear exhaust noises rather than belt whine and turbo whoosh

86 951 Driver

Has anyone had a shop chop their cat out then put flanges on it? That way you could swap in a testpipe whenever you want?

Barnaby Jones

I got in trouble for doing a cat delete once... because I used one of the good pillow cases...