[JmanE55]

Originally Posted by Walked U

They better be spraying Diamonds and platinum in there also

Try the RDSport catback w/quad tips.

[-Ryan-]

The zoomers sounded and looked best to me. I wish they made a kit for the e92. My brother has a set on his SRT8 and it sounds really good.

The eisenmann sounded just horid from inside the car.

[Shift_Fast]

The zoomers didnt look mandrel bent, were they??

Good research so far though, make sure to keep the M5 kills alive with whatever you do.

[j|rz44]

Some high flow secondaries should do the trick... No?
you really thinking of going back to the stock DP's?

[Walked U]

Originally Posted by jmramos44

Some high flow secondaries should do the trick... No?
you really thinking of going back to the stock DP's?

Ya high flows should do it with a X pipe. Thats why SS did. But also SS has a different muffer than esienmann. So im not too sure.

Ill keep you guys updated tho about what happens. Fixing it tomorrow.

[imaznumkay]

wow this thread has enlightened me in a new way about exhausts/pipe/dp combos, thanks Walked-U!
good luck on the fix tomorrow

[Crazy Bimmer]

Originally Posted by Walked U

I think deleting my primary cat, fucked everything up. Make everything a lot more raspier. That and probably removing my resonator.

Werd. Thats just nuts how much change in the sound just by removing the primary cats.

I think I will be leaving mine on and just remove the secondary cats. Too much it wont yield as much power that way. Ah well, cant have everything.

[Walked U]

Originally Posted by imaznumkay

wow this thread has enlightened me in a new way about exhausts/pipe/dp combos, thanks Walked-U!
good luck on the fix tomorrow

Thanks a lot. Glad that this thread helped you out.

Originally Posted by Crazy Bimmer

Werd. Thats just nuts how much change in the sound just by removing the primary cats.

I think I will be leaving mine on and just remove the secondary cats. Too much it wont yield as much power that way. Ah well, cant have everything.

Yup its a compromise. If your 335i is your daily driver dont do it, unless the sound doesnt bother you. Youd be suprised how much de cel pops I get too. I mean its cool, sounds like a real turbo car. But the rasp is ridiculous.

Made a 1.5k exhaust sound like shit basicly. LOL

My car isnt my DD but I cant stand the sound.

damn thats weird! my eisenmann does NOT sound a thing like that, at all. what else do you have that affects sound besides downpipes? anything?

[Walked U]

Originally Posted by that guy nico

damn thats weird! my eisenmann does NOT sound a thing like that, at all. what else do you have that affects sound besides downpipes? anything?

No cats no resonator. Both my pipes are fully divorced. Except for the H pipe thats on the eisenmann mufflers.

You still have your primary and 2ndary cat in with the stock X pipe.

[sambonator]

Originally Posted by Walked U

... if you dont want your car to sound like shit dont take off your Primary cat...

Thanks for the study Sherwin! I feel like I learned a lot about the e90 335i exhaust by your endeavors.

I'm a little curious about your conclusion regarding primary cats. I think many people may end up without primary cats (with down pipes) but keep the secondary cats. I know Charlie says the downpipes (primary cat deleted) with stock exhaust sounds great. Have you heard that combo?

Now I'm wondering if the catless downpipes with a 2ndary cat-back exhaust would sound bad... maybe a Riss downpipes with borla. What do you think?

Thanks again Sherwin for posting all your findings!
Sam

Originally Posted by Walked U

No cats no resonator. Both my pipes are fully divorced. Except for the H pipe thats on the eisenmann mufflers.

You still have your primary and 2ndary cat in with the stock X pipe.

ohh thats why
thanks and good luck with everything man!

[Walked U]

Originally Posted by sambonator

Thanks for the study Sherwin! I feel like I learned a lot about the e90 335i exhaust by your endeavors.

I'm a little curious about your conclusion regarding primary cats. I think many people may end up without primary cats (with down pipes) but keep the secondary cats. I know Charlie says the downpipes (primary cat deleted) with stock exhaust sounds great. Have you heard that combo?

Now I'm wondering if the catless downpipes with a 2ndary cat-back exhaust would sound bad... maybe a Riss downpipes with borla. What do you think?

Thanks again Sherwin for posting all your findings!
Sam

Thanks man.

Anyways what I think is if you at least keep 1 set of cats on your car it shouldnt be raspy at all. You wont get de cel pops. (unless you want it)

1 set of cats + X pipe / resonator should keep you rasp free.

It all depends on your muffler / cat / resonator combo. Ive found that with my set up (no cats / no resonator) that you cant escape the rasp regardless of what mufflers you run.

Borla exhaust should be ok since I believe its only an axle back exhaust. So even if you delete the primary cat you still have your 2ndary cat / resonator.

There are mufflers you can get to lessen the rasp tho. But not get rid of all of it. I thikn the Borla XR-1 mufflers + a x pipe do a good job of keeping the rasp at bay until top end.

[Walked U]

Originally Posted by that guy nico

ohh thats why
thanks and good luck with everything man!

Lol thanks nico. Even if it does cost me like 5-10 rwhp i dont care anymore. Im kinda sick of my car sounding like shit. LOL

[BeMyWife330i]

oh wow, the last one sounds bad........this saturday if ill have time ill be installing SS headers,eisenmann SR pipes and IKON muffler(330i e90)that leaves me with no cats and no resonators, i wonder how will it sound? but ill drive with such setup for couple weeks till my RT (random technology)hi flow cats come in and see if it will change the sound.....? to OP when you had no cats and no resonators did the car throw any errors(check engine)?

[down4it]

I liked the 4th one... I have no cats... I run Dual Borla XR-1's with a 2.5" turbo back... I like the sound, there is rasp between 2500-3000rpm but this is the sound of our inline six TT... I guess if you dont like the sound of the car then maybe you got the wrong car...

[Walked U]

Originally Posted by down4it

I liked the 4th one... I have no cats... I run Dual Borla XR-1's with a 2.5" turbo back... I like the sound, there is rasp between 2500-3000rpm but this is the sound of our inline six TT... I guess if you dont like the sound of the car then maybe you got the wrong car...

Originally Posted by Walked U

.

There are mufflers you can get to lessen the rasp tho. But not get rid of all of it. I thikn the Borla XR-1 mufflers + a x pipe do a good job of keeping the rasp at bay.

Theres a difference between having rasp from 2500-3000 rpms to have rasp at 2000 rpms - redline tho.

Plus if I remember correctly you run a X pipe also?

[BoostedBMW]

Originally Posted by down4it

I liked the 4th one... I have no cats... I run Dual Borla XR-1's with a 2.5" turbo back... I like the sound, there is rasp between 2500-3000rpm but this is the sound of our inline six TT... I guess if you dont like the sound of the car then maybe you got the wrong car...

I would agree with you there if this was an E46 M3 since that car has a lot of rasp even bone stock, but I think that this car is different since there are many exhaust combinations that you can run without introducing any rasp into the exhaust sound. It doesn't mean that you bought the wrong car, it just means that you should leave the cats on if it sounds like crap without them. I think that a set of resonators will really help to improve his exhaust sound though, and I think that they should offer resonated downpipes to start with instead of just straight pipes that usually result in a lot of rasp. The same thing happened on my brother's 350z. His exhaust sounded great with a full Y-pipe/fujitsubo exhaust with removed aftermarket resonator, and then he was cheap and bought straight pipes instead of going with resonated ones and the car is now a rasp machine from 3500rpm to redline. Hopefully this thread will grab the attention of the companies who are making catless downpipes and will encourage them to at least look into any resonated options that are out there.

[Omar@ActiveAutowerke]

Originally Posted by sflgator

Another option is the AA exhaust, which revah2 mentioned, but I just don't like the muffler tips...kind of "thin" or something, but I suppose they could change them out for whatever you like (just imho).

Anyway, I really like the stock exhaust note, even if it's a bit restrictive.

Our tips are 90 MM with a rolled tip design. Not thin compared to the others...

[retrodrive]

I wonder how much would catted downpipes change the sound. Thanks for posting Walked U. This thread helps a lot to all of us who experiment with our exhaust options.

[down4it]

Originally Posted by Walked U

Theres a difference between having rasp from 2500-3000 rpms to have rasp at 2000 rpms - redline tho.

Plus if I remember correctly you run a X pipe also?

Yes i am running an x-pipe... The rasp only shows up between 2500-3000rpm like i said and then goes away and the car is just loud all the way too redline...

I get a lot of compliments on my exhaust everywhere i go and like you i have experimented with different piping (X-pipe & no X-pipe) and different mufflers and in the end im sticking with this set-up... We've probably spent as much money on our exhausts by now to equal a turbo upgrade.hahaha...

I think if i am going to change anything on the exhaust again i will add a resonator on each side and see how that sounds... For now though its great for setting off car alarms everywhere and pissing off the neighbors... Oh and of course scaring old people and young children.

[ulises 335i]

Zoomer exhaust : Had to be my 2nd if not very close to 1st favorite. I sold it... i wish I didnt.

hahaha....... damn that was the best buy in my life.

that night you told me you were selling the exhaust i couldn't sleep from excitement.

( sorry )