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Old 12-25-2012, 11:35 AM
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bear-avhistory bear-avhistory is online now
2014 435M-Sport/MPPK
Location: NC - USA
 
Join Date: Nov 2006
Posts: 2,291
Mein Auto: 2014 435M-Sport/MPPK
Exhausts/mufflers are only good for getting the sound you want & do almost nothing for WHP. If you are looking for power outside of a tune add downpipes but again a dealer will not be happy with you. Downpipes are most effective if you have a tune.

Best bang for the buck ($500) is the JB4 piggy back tune. Cobb is also a good tune, but more expensive.

My car with only a JB4 & FMIC about $1100 does 12.5 X 114.5
http://www.dragtimes.com/BMW-335i-Timeslip-24471.html

Vbox is from a FBO JB4 car that runs 11.1 X 130 at the track.
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Last edited by bear-avhistory; 12-25-2012 at 11:44 AM.
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