N52 Exhaust Help (Headers + ?)

Eagle1oh7 · 04-10-2020, 02:02 AM

Quote:

Originally Posted by carscatscoffee15

Quote:

Originally Posted by Eagle1oh7

Quote:

Originally Posted by carscatscoffee15

Quote:

Originally Posted by Eagle1oh7

Quite a few guys don't do the muffler delete without the the secondaries. I am of the opinion of getting a BMW PE or other aftermarket muffler and use a resonator. My setup is Eisenmann catback and AA headers. No secondaries and it comes with a resonator, when fully warmed up it's quite mellow, but will scream and backfire when going WOT and downshifting aggressively, the exhaust shoots flames some times too lol

Does it smell?

The smell varies. Sometimes at the red light if there is no wind blowing or there is wind blowing in the other direction.

Quote:

Originally Posted by Biginboca

Quote:

Originally Posted by carscatscoffee15

This is exactly what I am looking for. My E82 128i has the AA catback exhaust/anti drone muffler and catless headers but stock secondaries and stock res.. I was gonna either do Supersprint Sec 1 delete with their tuned sec 2 res or keep my stock secondaries and do a Supersprint
Sec 2 delete.

How is the smell if any with your set up Biginboca?

The smell is strong when you smell it, but you will smell it pretty much only in 2 circumstances.

Coming to a red light with your window a down. (After you have stopped for a few seconds the exhaust wave catches up to the car and you smell it inside the car for about 10 seconds before it seems to mostly dissipate.)

If you have the car running and go to put something in the trunk.

how do you guys pass inspection with the headers for no cats at all? I'm just worried about that. If that's the case I might need to keep stock ones to swap out when inspection comes. I was also looking at the Supersprint HFCs but that might have to wait till I do my suspension work first and I haven't had much luck finding anyone's experience with those

would a muffler shop be able to fabricate high flow cats so I can have the best of both worlds? I'm also afraid my car will be overly loud with my current set up

I pay extra and I have the original cats. AFE makes high flows.

carscatscoffee15 · 04-10-2020, 07:39 AM

Quote:

Originally Posted by Eagle1oh7

Quote:

Originally Posted by carscatscoffee15

Quote:

Originally Posted by Eagle1oh7

Quote:

Originally Posted by carscatscoffee15

Quote:

Originally Posted by Eagle1oh7

Quite a few guys don't do the muffler delete without the the secondaries. I am of the opinion of getting a BMW PE or other aftermarket muffler and use a resonator. My setup is Eisenmann catback and AA headers. No secondaries and it comes with a resonator, when fully warmed up it's quite mellow, but will scream and backfire when going WOT and downshifting aggressively, the exhaust shoots flames some times too lol

Does it smell?

The smell varies. Sometimes at the red light if there is no wind blowing or there is wind blowing in the other direction.

Quote:

Originally Posted by Biginboca

Quote:

Originally Posted by carscatscoffee15

This is exactly what I am looking for. My E82 128i has the AA catback exhaust/anti drone muffler and catless headers but stock secondaries and stock res.. I was gonna either do Supersprint Sec 1 delete with their tuned sec 2 res or keep my stock secondaries and do a Supersprint
Sec 2 delete.

How is the smell if any with your set up Biginboca?

The smell is strong when you smell it, but you will smell it pretty much only in 2 circumstances.

Coming to a red light with your window a down. (After you have stopped for a few seconds the exhaust wave catches up to the car and you smell it inside the car for about 10 seconds before it seems to mostly dissipate.)

If you have the car running and go to put something in the trunk.

how do you guys pass inspection with the headers for no cats at all? I'm just worried about that. If that's the case I might need to keep stock ones to swap out when inspection comes. I was also looking at the Supersprint HFCs but that might have to wait till I do my suspension work first and I haven't had much luck finding anyone's experience with those

would a muffler shop be able to fabricate high flow cats so I can have the best of both worlds? I'm also afraid my car will be overly loud with my current set up

I pay extra and I have the original cats. AFE makes high flows.

not willing to go the AFE route

bluewater328 · 05-01-2020, 04:31 AM

Quote:

Originally Posted by carscatscoffee15

not willing to go the AFE route

What about Magnaflow?

NWA E90 · 08-05-2020, 11:12 PM

Quote:

Originally Posted by carscatscoffee15

not willing to go the AFE route

I wouldn't go AFE for exhausts or intakes for that matter either.

I have the same setup (inspired by big) except for SS section 1. if you're worried about emissions go with the Evolve R tune. They're able to disable the cat monitors and dial down the sensitivity of the rear 02's.

carscatscoffee15 · 08-06-2020, 09:39 AM

Quote:

Originally Posted by NWA E90

Quote:

Originally Posted by carscatscoffee15

not willing to go the AFE route

I wouldn't go AFE for exhausts or intakes for that matter either.

I have the same setup (inspired by big) except for SS section 1. if you're worried about emissions go with the Evolve R tune. They're able to disable the cat monitors and dial down the sensitivity of the rear 02's.

Quote:

Originally Posted by NWA E90

Quote:

Originally Posted by carscatscoffee15

not willing to go the AFE route

I wouldn't go AFE for exhausts or intakes for that matter either.

I have the same setup (inspired by big) except for SS section 1. if you're worried about emissions go with the Evolve R tune. They're able to disable the cat monitors and dial down the sensitivity of the rear 02's.

nah. I have StageFPs tune since I took the trip down there and got to get it done on their dyno

hassmaschine · 08-06-2020, 01:20 PM

Evolve tune? man, I haven't heard that name in ages. There are reasons...

bluewater328 · 08-06-2020, 03:42 PM

The more I read these things, the more it confirms how much the stock middle resonator/muffler, whatever dampens the sound. That seems to be a common factor for respectable noise when cruising and nice pepper when you push. Seems to be regardless of the header involved.

AmuroRay · 09-14-2020, 04:57 PM

Quote:

Originally Posted by carscatscoffee15

nah. I have StageFPs tune since I took the trip down there and got to get it done on their dyno

What were the results?

08-06-2020, 01:20 PM	#116
hassmaschine Major General 3966 Rep 7,215 Posts Drives: "NBO" 330i Join Date: Jun 2014 Location: earth iTrader: (0)	Evolve tune? man, I haven't heard that name in ages. There are reasons...
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08-06-2020, 03:42 PM	#117
bluewater328 Colonel 626 Rep 2,100 Posts Drives: 2011 bluewater 328i LCI sedan Join Date: Aug 2010 Location: Hawaii iTrader: (0)	The more I read these things, the more it confirms how much the stock middle resonator/muffler, whatever dampens the sound. That seems to be a common factor for respectable noise when cruising and nice pepper when you push. Seems to be regardless of the header involved.
	Appreciate 0 Quote