[E92TiAg335i]

Hey guys.

I currently have JB4 G5 ISO on my n55, but i'd like to get a down pipe...

I'm most likely going to run just a catless down pipe and a stock exhaust...


My question is how loud will the exhaust be? I had a bolt on/straight piped e46 m3 and i couldn't DD it anymore due to how loud it was.

Anybody weld any resonators in? or is it not that bad unless WOT?


Thanks.

[Peen]

Not nearly as loud as a straight pipe. It's really not loud at all. In fact, except for on cold start I can't tell any difference at idle. Even part throttle it's not a whole lot difference. It's a bit louder at full throttle but not much.

[Joey911]

Originally Posted by E92TiAg335i

Hey guys.

I currently have JB4 G5 ISO on my n55, but i'd like to get a down pipe...

I'm most likely going to run just a catless down pipe and a stock exhaust...


My question is how loud will the exhaust be? I had a bolt on/straight piped e46 m3 and i couldn't DD it anymore due to how loud it was.

Anybody weld any resonators in? or is it not that bad unless WOT?


Thanks.

My experience is aftermarket downpipe without mounts will fuck your V-band clamp and rattle like shit (the fact that it doesn't have a flex section puts lot of stress on the turbo side, and the clamp).

Noise wise, it's pretty damn quiet on this car! Tune can take care of most of your drones, and oh, keep the flap enabled if you're cruising, otherwise drone.

[BKBMW335I]

Originally Posted by E92TiAg335i

Hey guys.

I currently have JB4 G5 ISO on my n55, but i'd like to get a down pipe...

I'm most likely going to run just a catless down pipe and a stock exhaust...


My question is how loud will the exhaust be? I had a bolt on/straight piped e46 m3 and i couldn't DD it anymore due to how loud it was.

Anybody weld any resonators in? or is it not that bad unless WOT?


Thanks.

My DPs are loud as hell for a minute or so during cold starts but other than that you can hardly tell they're there unless you are blazing through a tunnel then the sound is loud as f*ck but oh what a lovely sound.

[Johnny Boost]

Originally Posted by E92TiAg335i

Hey guys.

I currently have JB4 G5 ISO on my n55, but i'd like to get a down pipe...

I'm most likely going to run just a catless down pipe and a stock exhaust...


My question is how loud will the exhaust be? I had a bolt on/straight piped e46 m3 and i couldn't DD it anymore due to how loud it was.

Anybody weld any resonators in? or is it not that bad unless WOT?


Thanks.

I have had a catless DP for years with different set ups. I can promise you that you do not need resonators with the stock exhaust. Like others have stated, it is barely louder than stock DP.

[mike@x-ph.com]

Originally Posted by Johnny Boost

I have had a catless DP for years with different set ups. I can promise you that you do not need resonators with the stock exhaust. Like others have stated, it is barely louder than stock DP.

+1

It is louder on cold start and WOT, you would barely notice it during daily driving

[Tricki]

Originally Posted by E92TiAg335i

Hey guys.

I currently have JB4 G5 ISO on my n55, but i'd like to get a down pipe...

I'm most likely going to run just a catless down pipe and a stock exhaust...


My question is how loud will the exhaust be? I had a bolt on/straight piped e46 m3 and i couldn't DD it anymore due to how loud it was.

Anybody weld any resonators in? or is it not that bad unless WOT?


Thanks.

https://instagram.com/p/_K0wNuvcUu/

https://instagram.com/p/wn_e9VPcfM/

Couple of links for my car which has stock exhaust with bms Downpipe !! Has PPK tune as well.

[Ozzie335i]

Resonators will not fit on 335i N55 cars. There simply is no room as there are several bends in the exhaust from the downpipe back.

[Dhillon92]

Originally Posted by Ozzie335i

Resonators will not fit on 335i N55 cars. There simply is no room as there are several bends in the exhaust from the downpipe back.

I can see resonators fitting perfectly in place of the secondary cats, would be tough to get them inline with the cats though.

[snaimpally]

Originally Posted by BKBMW335I

My DPs are loud as hell for a minute or so during cold starts but other than that you can hardly tell they're there unless you are blazing through a tunnel then the sound is loud as f*ck but oh what a lovely sound.

This is my experience as well. Barely noticeable sound-wise. However, the acceleration is much smoother and there is noticeably more torque. Once installed you realize just how much the OEM DP was choking the engine.

[Turbod]

So I will say that it is loud during cold start (15 seconds) and it is noticeable during WOT but it is a pleasant subtle sound while cruising.

[mike@x-ph.com]

Originally Posted by Turbod

So I will say that it is loud during cold start (15 seconds) and it is noticeable during WOT but it is a pleasant subtle sound while cruising.

Agree 100%

[oldirtysturdy]

it's definitely much louder than stock. it sounds great though. I don't know what this "barely noticeable sound-wise" shit is, but it's more than barely noticeable. here is a vid I took with my DP only (and procede). Not bad at all from the cabin, but it is definitely much louder outside.

https://www.youtube.com/watch?v=JPmU...ature=youtu.be

[BKBMW335I]

Originally Posted by oldirtysturdy

it's definitely much louder than stock. it sounds great though. I don't know what this "barely noticeable sound-wise" shit is, but it's more than barely noticeable. here is a vid I took with my DP only (and procede). Not bad at all from the cabin, but it is definitely much louder outside.

https://www.youtube.com/watch?v=JPmU...ature=youtu.be

I think we're all referring to what it sounds like from inside the cabin, not outside.

The vast majority of us agree that it is louder outside (and I know you love your sound going through tunnels like the rest of us) but inside I barely notice my DPs.

[Ozzie335i]

Originally Posted by Dhillon92

I can see resonators fitting perfectly in place of the secondary cats, would be tough to get them inline with the cats though.

Is your car a 2011 Coupe? I had mine on the rack and there was no secondary cats, and no place to put resonators due to the bends and twisties.

[Dhillon92]

Originally Posted by Ozzie335i

Is your car a 2011 Coupe? I had mine on the rack and there was no secondary cats, and no place to put resonators due to the bends and twisties.

Yup, I have a '11 coupe xdrive, I would imagine you can fit the resonators in the exact same place as where my secondaries are located. I dont plan on getting under my car till the weekend, but I've seen pics in other threads showing the location.