spoon testpipe
#25
so this will sound stupid but how else will i ever know.... what exactly is does the test pipe do, my obvious guess is it lessens the restriction of air flow, but i mean like right now i got stock headers w/ invidia exhaust, 1 will i notice a gain and 2 will it make my already loud car any louder?
#29
???? would this make the S not pass smog??? well ofcourse if i have it on it won't pass but if i needed to pass smog and put back my stockie, would it pass smog??? does this mod make you blow black smoke too???or have a smelly exhaust?