[snipagang]

I have a catless dp on now on my 320i and to be honest its very quiet. I want to go full catback with 3” diameter piping but I am worried its going to be insanely loud. Anyone have experience with this? Ive watched a lot of videos but its just so hard to gauge. I live in suburban neighborhood where I just dont know If i can get away with a crazy loud cold start..

[sqwinny]

Cold starts with no resonator + with an aftermarket muffler are LOUD. If you are able to turn off cold cat heating and not have issues, this will allow your car to warm up slowly while not being a loud car getting to operating temps fast.

[snipagang]

Originally Posted by sqwinny

Cold starts with no resonator + with an aftermarket muffler are LOUD. If you are able to turn off cold cat heating and not have issues, this will allow your car to warm up slowly while not being a loud car getting to operating temps fast.

what about cold starts with stock resonator and aftermarket axleback

[drapzzy]

Originally Posted by snipagang

what about cold starts with stock resonator and aftermarket axleback

I have downpipes will 3 inch piping to a 335 muffler and its not even that loud

[sqwinny]

Originally Posted by snipagang

what about cold starts with stock resonator and aftermarket axleback

It's still loud. It's close to putting 20% throttle for sound. Turn off cold start and it's quiet

[mike@x-ph.com]

Sound is subjective; I think catless with the full exhaust is too loud for a daily driver.

I getting recommend an axle-back instead since you have the catless downpipe.

[chinniciF32]

if your already catless on stock exhaust and it isn't loud enough I would go with an aftermarket axel back first and see how loud that is for you and if you want more sound then get a full catback system or delete the resonator.

But I will say my car on cold starts is decently loud (subjective I know) but loud enough to the point that I cold started at my parents house and my mom said "what did you do to your car this time". My GF said "is your car always this loud when you start it?" lol. im only running stock OEM axel back (M performance exhaust) with high flow cat resonated.

[snipagang]

Originally Posted by mike@x-ph.com

Sound is subjective; I think catless with the full exhaust is too loud for a daily driver.

I getting recommend an axle-back instead since you have the catless downpipe.

the only reason I hvent fulled the trigger on an axleback is that I dont feel like cutting a hole in the bumper and I kind of want a big single exit…. However, I also want to get the 3” piping from a 328i as I feel like I might be able to get some power out of it too. The 320i has 2.3in diameter piping. Do you think that could make a difference? My car is stage 1.

[sqwinny]

328i piping is 2.5-2.75id, not 3", just an fyi

[snipagang]

Originally Posted by sqwinny

328i piping is 2.5-2.75id, not 3", just an fyi

oh okay, do you think larger diameter piping would make a difference regardless? and if not, are there any good single exit axlebacks on the market worth looking atp

[donjmeister]

Originally Posted by snipagang

what about cold starts with stock resonator and aftermarket axleback

I have a 2016 320i also. I put my catless downpipe yesterday with a rev9 335 style axleback.

Cold starts are loud, but it will last 15-20 seconds. During the day, it's pretty acceptable in my opinion, however if you do a cold start at night, I wouldn't recommend it as it'd be too loud. I might take cold start off with bootmod3 just for this particular reason

On another note, did you have any rattling sound after putting your catless downpipe on your 320?

[snipagang]

Originally Posted by donjmeister

I have a 2016 320i also. I put my catless downpipe yesterday with a rev9 335 style axleback.

Cold starts are loud, but it will last 15-20 seconds. During the day, it's pretty acceptable in my opinion, however if you do a cold start at night, I wouldn't recommend it as it'd be too loud. I might take cold start off with bootmod3 just for this particular reason

On another note, did you have any rattling sound after putting your catless downpipe on your 320?

no out of the ordinary rattles. Can you send me a video of a cold start and some other revs.

[sqwinny]

Originally Posted by snipagang

oh okay, do you think larger diameter piping would make a difference regardless? and if not, are there any good single exit axlebacks on the market worth looking atp

Nothing that is single which is your desired 3". Unless you are making close to 400 whp, 2.5-2.75" ID is fine for this power level and how much exhaust gas can flow through the stock and upgraded (stage 1, stage 2) turbos.

Custom turbo setups will utilize 3" ID exhaust.

If it's up to me, grab a 335i f30 muffler (stock or aftermarket) and your good to go.

[donjmeister]

Originally Posted by snipagang

no out of the ordinary rattles. Can you send me a video of a cold start and some other revs.

send me a DM on IG @dneflas_

[snipagang]

Originally Posted by sqwinny

Nothing that is single which is your desired 3". Unless you are making close to 400 whp, 2.5-2.75" ID is fine for this power level and how much exhaust gas can flow through the stock and upgraded (stage 1, stage 2) turbos.

Custom turbo setups will utilize 3" ID exhaust.

If it's up to me, grab a 335i f30 muffler (stock or aftermarket) and your good to go.

Okay, thanks for the advice. The only issue is id have to cut the bumper or replace the bumper in order to make a dual exit exhaust fit. Too bad there arent any single exit axlebacks out there!!

[Gen13 F36]

Another loud BMW....oh God😏

I'm more into mature symphony 🤔

[snipagang]

Originally Posted by Gen13 F36

Another loud BMW....oh God😏

I'm more into mature symphony 🤔

wanna buy me a naturally aspirated v12?

[Gen13 F36]

Originally Posted by snipagang

wanna buy me a naturally aspirated v12?

You can get yourself that....go buy a 1995 Mercedes Benz S600, it got a V12 right up your alley. Or equivalent BMW 7 series of the same year.

Live the James Bond life in Tomorrow Never Dies.

[snipagang]

Originally Posted by Gen13 F36

You can get yourself that....go buy a 1995 Mercedes Benz S600, it got a V12 right up your alley. Or equivalent BMW 7 series of the same year.

Live the James Bond life in Tomorrow Never Dies.

lmao ok im On my way! to buy a 95 mercedes

[1slow320]

Originally Posted by donjmeister

I have a 2016 320i also. I put my catless downpipe yesterday with a rev9 335 style axleback.

Cold starts are loud, but it will last 15-20 seconds. During the day, it's pretty acceptable in my opinion, however if you do a cold start at night, I wouldn't recommend it as it'd be too loud. I might take cold start off with bootmod3 just for this particular reason

On another note, did you have any rattling sound after putting your catless downpipe on your 320?

Did you get the one with the muffler on it? I was thinking about getting that one

[floridaorange]

get an axleback... startup will be loud, just keep your garage door closed if it's not an ideal time of day. I had this setup, it was plenty loud, louder on a 4 banger is just silly.

[AustinA32]

Originally Posted by snipagang

I have a catless dp on now on my 320i and to be honest its very quiet. I want to go full catback with 3” diameter piping but I am worried its going to be insanely loud. Anyone have experience with this? Ive watched a lot of videos but its just so hard to gauge. I live in suburban neighborhood where I just dont know If i can get away with a crazy loud cold start..

I have a full borla catback exhaust on my 328i and it sounds amazing, highly recommend. and with a catless dp it would sound better just make sure and get a good tune for your dp.