Horsepower ?
#1
Horsepower ?
I just picked up and '04 sti muffler for my '04 RS. Cousin told me that putting it on would make me lose horsepower. Wondering if what my cousin told me is true.? Sorry guys, I am new to i-club and is a first time owner of a suby. Can anyone provide real answers. Dont really trust my cousin>>>>.....
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