guys running no cat...

[JAM]

how loud is your car? im consitering cutting the cat off of my car and replacing it with a straight through exhaust. would it be stupid loud?

fyi, bmw e30 cats go for about $140 at the scrap yard :D

[MR 325]

I have no cat but I do have a muffler in the center section so that makes up for it.

[dlmpsy]

I don't have cats on my car, and I have a Bosal muffler (with holes) which will soon be replaced with a Stromung muffler. Loud is a relative term, but it doesn't really bother me. I am use to V-8's with Flowmasters.

[silversleeper]

the only downside i saw after removing the cats from my 325i with the IE stainless catback, was the rasp.

but i recently found out that companies make rasp eliminators now.

[JAM]

word, thanks for the input guys, some kid on a local board is giving away a tt stainless 2.5 catback with a flowmaster for a passat... tiem to do some cutting and welding :)

[MR 325]

the only downside i saw after removing the cats from my 325i with the IE stainless catback, was the rasp.

but i recently found out that companies make rasp eliminators now.

Maybe I understood you wrong but if you bought an IE catback you still have the stock cat.

[silversleeper]

Maybe I understood you wrong but if you bought an IE catback you still have the stock cat.

Yes, thus the term "cat-back".

But when I had it installed, I removed the cats to get more sound out of the system, which it did. But with the addition of rasp. E46 M3 rasp. It's not bad sounding, it's different, but I prefer a deeper, cleaner sound.

[MR 325]

Yes, thus the term "cat-back".

But when I had it installed, I removed the cats to get more sound out of the system, which it did. But with the addition of rasp. E46 M3 rasp. It's not bad sounding, it's different, but I prefer a deeper, cleaner sound.

Ah, gotcha.

You could always add a center muffler of resonator.

[silversleeper]

Ah, gotcha.

You could always add a center muffler of resonator.

yeah, that would be the way to go. maybe in place of the cat, use the rasp eliminators. they look like glasspacks from what ive seen.

[fretburnr]

I've got no cat - merged to a single 2.5 right after the downtubes, and a magnaflow resonator where the cat used to be... all back out to a magnaflow muff.

It's pretty loud - I have no problem being heard when I want to, but it's really not that bad putting around town.

It also doesn't have much rasp, at least not the e46 kind :p

[JoeMadoo]

How can I quiet down my exhaust alittle bit? I have a single 3 inch from the downpipes to a magnaflow cat and magnaflow turbo xl. Will a resonator quiet it down a bit or should i just get a different muffler.

[MR 325]

How can I quiet down my exhaust alittle bit? I have a single 3 inch from the downpipes to a magnaflow cat and magnaflow turbo xl. Will a resonator quiet it down a bit or should i just get a different muffler.

If you're only wanting it a bit quieter just add a resonator or cherry bomb to the center section if there's room. Pep Boys actually has a large selection of cherry bomb mufflers and they're cheap too.

[Vicarious]

what do you guys with no cats do about emmissions tests? do you just go to a private shop and pay the guy off to give you a "Pass" sticker? in NJ ure gonna fail without a cat im almost positive.

[direction88]

what do you guys with no cats do about emmissions tests? do you just go to a private shop and pay the guy off to give you a "Pass" sticker? in NJ ure gonna fail without a cat im almost positive.

With clean oil and your EGR connected any reasonably maintained M20 will pass most emissions tests without a cat! However you may fail the visual inspection if they do one. I'm in Vancouver and the air scare tests are probably a bit different here but I hope this is still of some use.

[Mr.sexymorningvoice]

Hey well i have a gutted cat, and 2.5inch all the way back into a 2ft glasspack, and it sounds good, nice deep tone, with a little rasp at 2k rpm, but overall it sounds nice