some exhaust questions - The Unofficial BMW M5 Messageboard (m5board.com)

jmott · 26th December 2002, 16:34

I plan to autocross my M5 in Super Stock. While this may be somewhat futile at the divisional and national level, it should be fun locally, and a few Z06 with less skilled drivers should hopefully get embarassed.

For those not familiar, the Stock classes in autocross allow very few modifications. One thing you can change is any of the exauhst BEHIND the catalytic converters.

My only considerations are weight, power, and price. The dinan system claims a 30lbs weight reduction. Does it replace the mufflers and resonators?

Do any other companies offer something like supersprint, which has the x-pipe and mufflers? Will the supersprint system save you 30lbs like the dinan system claims to?

any other options that will get me 5+hp and a nice weight drop? Anyone have some before/after dynos?

thanks for any info!

tfung · 26th December 2002, 16:45

all aftermarket exhausts save about 30lbs or more of weight... the stock system is extremely heavy.... besides, nearly all the exhausts can use the supersprint x-pipes with it..

SouthshoreM6 · 26th December 2002, 17:11

Jmott: There is a TON of stuff on this subject in the archives- try the search engine. There are even sound clips of many different aftermarket systems.

Hope this helps...

RAREM5 · 26th December 2002, 17:58

Dinan exhausts doesn't replace stock resonator, only Super Sprint X-pipe.

check out this thread: http://www.bmwm5.com/vbulletin/showt...threadid=24568

Enjoy

jmott · 26th December 2002, 19:23

Quote:

Originally posted by SouthshoreM5
Jmott: There is a TON of stuff on this subject in the archives- try the search engine. There are even sound clips of many different aftermarket systems.

Hope this helps...

thanks, I did do a search. Some of the specific question I had weren't answered by it. And Im hoping for more dynos than the one or two I found =)