Exhaust for n51????

Swimjim · 03-23-2015, 08:36 PM

I was getting ready to have the ecu flashed and after-cat exhaust done next week. The flash will be from AA. I wanted to go with the exhaust from AA as well only to find out they only have a header!

Not wanting to go that route yet, what options do i have and is the $$$ worth the hp/torque gains?

TheSt|G · 03-24-2015, 08:15 AM

No muffler makes any HP that is worth the money. Save for the headers first, then tune the sound with the muffler(all they are good for and very subjective).

Swimjim · 03-24-2015, 08:45 AM

thank stig... a header it shall be.

btw... will the ecu need any correction for a header?

TheSt|G · 03-24-2015, 09:06 AM

Quote:

Originally Posted by Swimjim

thank stig... a header it shall be.

btw... will the ecu need any correction for a header?

The car will run, but you will need a tune if you don't want to throw emissions codes during state inspection. Plus a tune will get you the most from the headers.

jclaib7 · 03-25-2015, 07:10 PM

Reach out to Andrew Fish at AA. They are still pushing the $850 introductory price for the headers and the upgraded ECU tune at $100. I have an AA tune already so you may need to spring for the complete tune.

I may be taking this leap very soon, or upgrading my brakes for autocross. Not sure yet.

P.S. Agreed the BMW Performance exhaust isn't worth the money, HP wise. But I have it and would spend the money again for it based on the sound alone.

Dackelone · 03-25-2015, 07:24 PM

You could also get BMW's Performance Exhaust. It won't make any power but it sounds delicious!

Swimjim · 03-26-2015, 07:44 AM

i have an appt to get the ecu flashed next week from an AA dealer. dropped in a k&n and will add "scoops" at the suggestion of the AA dealer.

going to wait on the exhaust to save some $$$. i dont see the need to spend $$$ on the after-cat muffler just for sound without any power gains. might as well put "spinners" or neon on the car!

i understand AA is working on an after-cat system which can add power. may try to bundle the entire exhaust in the future.

may look at suspension upgrades instead... bilstein cup kit, M3 arms/bushings... just to get car even more fun to drive. it is my DD so i am not going to go too nuts!

thanks for all the input.

TheSt|G · 03-26-2015, 08:05 AM

I the AA muffler isn't going to make any power either.

03-23-2015, 08:36 PM	#1
Swimjim Private First Class 24 Rep 177 Posts Drives: 2008 128i Join Date: Apr 2012 Location: TX iTrader: (1)	Exhaust for n51???? I was getting ready to have the ecu flashed and after-cat exhaust done next week. The flash will be from AA. I wanted to go with the exhaust from AA as well only to find out they only have a header! Not wanting to go that route yet, what options do i have and is the $$$ worth the hp/torque gains?
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03-24-2015, 08:15 AM	#2
TheSt\|G Resident Tamed Racing Driver 298 Rep 4,697 Posts Drives: 911, 130is, E39 M5, E36 M3 Join Date: Mar 2008 Location: Outside Philly iTrader: (2)	No muffler makes any HP that is worth the money. Save for the headers first, then tune the sound with the muffler(all they are good for and very subjective). __________________ 2005 E46 M3 Interlagos/Cinnamon with Sunroof Delete
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03-24-2015, 08:45 AM	#3
Swimjim Private First Class 24 Rep 177 Posts Drives: 2008 128i Join Date: Apr 2012 Location: TX iTrader: (1)	thank stig... a header it shall be. btw... will the ecu need any correction for a header?
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03-25-2015, 07:10 PM	#5
jclaib7 First Lieutenant 142 Rep 324 Posts Drives: 2018 M2 Black Shadow Edition Join Date: Jul 2013 Location: United States, Beverly Ma. iTrader: (2)	Reach out to Andrew Fish at AA. They are still pushing the $850 introductory price for the headers and the upgraded ECU tune at $100. I have an AA tune already so you may need to spring for the complete tune. I may be taking this leap very soon, or upgrading my brakes for autocross. Not sure yet. P.S. Agreed the BMW Performance exhaust isn't worth the money, HP wise. But I have it and would spend the money again for it based on the sound alone. __________________ 2018 M2 Black Shadow Edition
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03-25-2015, 07:24 PM	#6
Dackelone European Editor 10528 Rep 22,992 Posts Drives: N54 e82 Join Date: Feb 2010 Location: Bayern, Germany iTrader: (1)	You could also get BMW's Performance Exhaust. It won't make any power but it sounds delicious! __________________ Dackel's European Delivery Museum Guide
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03-26-2015, 07:44 AM	#7
Swimjim Private First Class 24 Rep 177 Posts Drives: 2008 128i Join Date: Apr 2012 Location: TX iTrader: (1)	i have an appt to get the ecu flashed next week from an AA dealer. dropped in a k&n and will add "scoops" at the suggestion of the AA dealer. going to wait on the exhaust to save some $$$. i dont see the need to spend $$$ on the after-cat muffler just for sound without any power gains. might as well put "spinners" or neon on the car! i understand AA is working on an after-cat system which can add power. may try to bundle the entire exhaust in the future. may look at suspension upgrades instead... bilstein cup kit, M3 arms/bushings... just to get car even more fun to drive. it is my DD so i am not going to go too nuts! thanks for all the input.
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03-26-2015, 08:05 AM	#8
TheSt\|G Resident Tamed Racing Driver 298 Rep 4,697 Posts Drives: 911, 130is, E39 M5, E36 M3 Join Date: Mar 2008 Location: Outside Philly iTrader: (2)	I the AA muffler isn't going to make any power either. __________________ 2005 E46 M3 Interlagos/Cinnamon with Sunroof Delete
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