if i buy a testpipe im thinking ill need a tune, i mean, friends with sti's need it if they get it to see the power gain. is that true for the ecs testpipe? also i live at 7k feet in kind of a small town so i would prob have to go somewhere to get one, then the problem is, will it be pretty bad if i change altitudes, like am i looking at a boost spike issue? thanks

 

you shoulds be fine. A tune is not needed for hp gains. the only thing I can say if it is illegal in your state done get caught or you can kiss your car and 5,000- 10,000 dollars good bye along with your license.

 

well there is so many rednecks running around here with straight pipes, no one cares!

it will have quicker spool up and lower EGTs, my car also cools down quicker

 

Your cars ecu will adapt to the test pipe, mine took about 50 miles before I really felt a difference. no spiking, and no other drawbacks that I found.