he is just an idea, has anyone put exhaust cutouts on their car that could be activated with a switch AND a rpm window switch, this would allow you to keep the backpressure for the low end torque and have the free flowing exhaust for the high end of the rpms. you would also be able to have a really really quiet exhaust to drive around town but easily be able to hit a switch whenever you want and have a free flowing exhaust



this could also possibly work inside your existing exhaust, the butterfly inside could be partially open so it flows yet creates a lot of backpressure and then at the flick of a switch, free flowing....

some feedback from some real gearheads to see what you think??!?!

 

i think someones already done this, not to a Z but something else