I did catless on mine. i took it off two days later because it pounded my head. I'm absolutely a fan of loud exhaust but i couldn't take it. not sure...
I've been having over boost issues on my 07 wrx. stage 1 cat back exhaust. ive been reading 17.xx psi and started looking for leaks in the hoses and...
vice grips and a hammer!!!! i just did my downpipe got very lucky that mine were easy. when you put the new one on tighten the bolts like a tire jump...