schip43

Just wondering I have a 2.5 inch test pipe at the moment but wondering about getting a 3 inch exhaust and using a hi flow Cat without muffler.

They did that on the Dodge SRT4 and it worked. Just a though.

Techno Duck

A buddy of mine is running the stock exhaust with no muffler. It is very loud, i would say louder than my full 3", no cat with muffler.

86 951 Driver

On the neon they ran 2 resonators though. Just keep that in mind. I have ran my car without the back half of the exhaust, I liked it, but it banged around so I didn't get to really hear it too much.

Paulyy

it would be loud. very loud. i turned my car on with just the down pipe to the turbo for "fun" and it make alot of noise.

kombatrok

I was wondering about this also... I have a high flow cat with the stock muffler and it is very quiet. The factory muffler is a straight through type isn't it?

Seems like it shouldn't be THAT much louder...

schip43

I did not know about the resonators? I was looking under my Toyota Tercel and it has a resonator?

This is just a thought ,I'm dumping the waste gate to atmosphere and actually with out the complicated tie in for the waste gate a 3 inch exhaust looks pretty simple!

samluke

3" exhaust. no muffler, no cat, no problem.

V2Rocket

it appears your car has two cats to remove before driving.

Crackership

I can't say for sure how it would work on a 951, but I know that a buddy of mine ran cats, no mufflers and small resonators on his Lotus Esprit V8TT and that car was so loud that it literally shook everything in my 3rd story apartment when he was in the underground parking garage. It sounded good though, absolutely deafening, but good

Paulyy

the stock muffler is very well designed. i drove around with a straight pipe with the stock muffler and it still was quiet.

kombatrok

How well does the stock muffler flow though?

My N/A is pretty loud with the same cat and factory muffler, the Turbo quiets the exhaust down a lot that's why I wondered if the Turbo would be fine without a muffler.

Paulyy

it's not restrictive at all. shine a torch though it

schip43

Took me a bit but I looked and found it! Fixed the original post!

schip43

Yep that's my thought exactly, a turbo a cat and no muffler in a 3
inch and I'm dumping the wastegate.

I found the electronic exhaust cutouts on E bay but using that I was worried about a stable AFR with the exhaust open or closed?

But it looks like there is at least one guy running it with no muffler and a cat?

schip43

No muffler or cat? That sounds ( no pun intened) :P, kinda loud?