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      11-08-2012, 11:30 PM   #13
Drives: '08 E90 335i
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2008 BMW 335i  [3.75]
Originally Posted by ec_E92 View Post
News flash, valvetronic has cutouts that open/close.
The valve'd exhausts are cutout exhausts. The valve'd systems (Evolve, Gintani, IPE, etc) all have a stock like "civil" setting & then the straight pipe setting. All of these systems still maintain the mufflers & have some backpressure (maintain TQ).

A cutout system basically eliminates the muffler section (assuming you install them post X-pipe). This will be loud as shit because you're eliminating the only remaining resonator (mufflers) with cutouts & you might also lose a small amount of TQ because of the decrease in backpressure

A cutout exhaust also costs ~1/10th of a valvetronic system

Last edited by benzy89; 11-09-2012 at 12:29 PM.
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