I have the injen true dual exhaust been having it for years in my 04 coupe but never thought about hfc or test pipes. I haven't done headers but wondering which would be better and give me alil more power. Need to tune it also. Any help
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Lartytiejdke3
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Art pipes or HFC
/thread, open google
/thread, open google
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gary c
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Fast Intention HFCs, they sound better than ART pipes and are legal in most states...just not mine! 
Gary
Gary
