i have berk test pipes. i love them. i do throw a service engine light tho... but i just bought a code reader from pepboys and clear it everytime it pops up. sound is fantastic and it really opens up response. there is a rasp from 2500-2800...really nothing major. i like it actually. and it has a nice cackle when u downshift. it smells....but oh soo good. haha
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