[guru_method]

Originally Posted by benzy89

If you want a single exhaust, go buy a Supra, EVO or WRX. You own a BMW, have some class & respect for the brand and either maintain the dual pipes or get quad (M3 style) tips

IMO, single side exhaust look ricey as shit & makes your car sound like a road mosquito. FUCK THAT

WOW... that was some great input considering nothing I wrote or anybody else for that mater suggested doing something like the pic you posted.

[BoostAddict]

Originally Posted by benzy89

If you want a single exhaust, go buy a Supra, EVO or WRX. You own a BMW, have some class & respect for the brand and either maintain the dual pipes or get quad (M3 style) tips

IMO, single side exhaust look ricey as shit & makes your car sound like a road mosquito. FUCK THAT

Yeah because my e46 looked and sounded so ricey

[benzy89]

Originally Posted by ***********

Yeah because my e46 looked and sounded so ricey

Your 328 was a single side exhaust, converting a 335i (dual exhaust) to a single exit exhaust would look & sound ricey as fuck since you'd have to install a large muffler/exhaust tipe to prevent any restriction. If you put a small/OEM sized tip, back pressure would be created which would decrease performance & make the whole project a waste of money

guru_method -- IF I misunderstand you it's because you mentioned a single exhaust, if you meant two single tips (a dual exhaust) then that's the OEM 335i setup and doesn't look stupid

[BoostAddict]

Originally Posted by benzy89

Your 328 was a single side exhaust, converting a 335i (dual exhaust) to a single exit exhaust would look & sound ricey as fuck since you'd have to install a large muffler/exhaust tipe to prevent any restriction. If you put a small/OEM sized tip, back pressure would be created which would decrease performance & make the whole project a waste of money

guru_method -- IF I misunderstand you it's because you mentioned a single exhaust, if you meant two single tips (a dual exhaust) then that's the OEM 335i setup and doesn't look stupid

I was more referring to the sound of converting from dual to single. Paring the pulses usually creates a smother sound. It would only sound "ricey" of you chose shitty mufflers. Most people wanting an aftermarket exhaust don't want stock sized tips. Most systems use 3.5" or 4" tips. Reducing down from say 4" to 3.5" for a tip is in no way going to create a restriction especially at the power levels the n54 is currently at.

As far as looks, I agree that it would look weird having the empty hole in the bumper. I was going to putting a dummy tip one side so it would look better.

I predict as more single turbos come out we'll start seeing single exhausts.

[Sered]

Originally Posted by BMW-SRT

I'm debating going Single 3" straight exhaust after downpipes, maybe a muffler, not sure yet. I tried searching but couldn't find anything. Has anyone on here ever gone single exhaust on the N54? I'm just trying to get an idea of what it would sound like.

I currently have catless DPs with 2nd cat delete, resonator delete on stock mufflers and my car sounds like crap... I might do muffler delete today and see how that sounds, while I decide on what rout to take.

I'd definitely avoid going to a 3" single, that is more restrictive than the stock piping. I'd go 3.5". This isn't a tiny 4cyl, the motor flows a lot of air.

Originally Posted by benzy89

You didn't search that hard because HPF makes an exhaust system like you're talking about.

Seems that he's talking about an actual single, which the HPF isn't. That exhaust is also muffler-less; it only has a single resonator in it; from what I see and have heard, it sounds terrible on a car with catless downpipes.

Originally Posted by benzy89

IMO, single side exhaust look ricey as shit & makes your car sound like a road mosquito. FUCK THAT

Supra exhaust sounds amazing though. It sounds like a proper I6. Want to know what SOUNDS ricey as shit? A stock-turboed 335i with no cats.

[BMW-SRT]

Originally Posted by AU335i

OP, go add some vibrant resonators 1790 or 1792 in place of where your secondary cats use to be and your exhaust sound will improve 100x.

with catless DP's and no secondary cats you get alot of rasp... the resonators will cut the rasp and you'll have a nice sounding exhaust.

I haven't checked this thread in a while but as of today other than a single dual inlet\outlet magnaflow muffler in place where the 2nd cats use to be its all straight pipe (if you can even consider it straight pipe now), but it sounds perfect to me, well unless I have the windows up with the AC on, then the in cabin drone is kind of loud lol

Here is a vid of my car this past weekend on the dyno at a car show, 2 mods and it made 380whp on mustang dyno, I'm happy with the numbers.

[guru_method]

Originally Posted by ***********

Yeah because my e46 looked and sounded so ricey

That's mint.

[03_uni-b]

I would like a single exit as well, but it still have the performance aspect and sound. cant seem to find something that fits the bill, as i want to go with the mtech 328 rear bumper.

[whyzee125]

Originally Posted by benzy89

If you want a single exhaust, go buy a Supra, EVO or WRX. You own a BMW, have some class & respect for the brand and either maintain the dual pipes or get quad (M3 style) tips

IMO, single side exhaust look ricey as shit & makes your car sound like a road mosquito. FUCK THAT

Pretty much every BMW until the 335i had the exhaust on one side.

[Antoans4]

Has anyone done it, i also don't like the sound of my 335is with catless downpipe and resonators where the secondary catalytics go, i wonder if it would sound like a 135 or 535

[Xavier716]

Don't mind the boost leak lol, just installed a new intercooler at the time of video

[AWD Addict]

This is surprising. Since losing the DP cats, my car sounds amazing. I wouldn't have guessed it'd get that bad with the downstream cat removed.

[oVeRdOsE.]

Originally Posted by Xavier716

Don't mind the boost leak lol, just installed a new intercooler at the time of video

nice, I'm going that route too. single T, 1-2-1

but Ill add :

- 3'' HFC (high flow catalytic converter)
- 3'' vibrant resonator
- 3'' valved muffler (probably from valvemaster)
- stock 328 tips, with 328 bumber obviously.

[iqraceworks]

For comparison...here is my 07' 335i with DP's, and secondaries swapped out for vibrant resonators....stock mufflers. I actually really like it....it's quite when cruising around or on the highway, but sounds sounding my better once you get the RPM's up.

Flows good enough to let the car run 10's in the 1/4....so it's not like it's holding it back much. I have the burbles set to "light".....

Oh, and it's not smoking...it was 35 degrees out last night....so you are going to see some steam coming out of the hot exhaust.

[oVeRdOsE.]

chasing that sound