both test pipes and resonated test pipes are straight through. the resonator just helps muffle a lil noise. it does nothing to block the air coming out.
i need these!
http://www.cntracing.com/CNT_perform...i_p/celfix.htm
mimics what some of the higher end brands due. my $199 rtp's are now $270.... grrrrrrr get what you pay for i guess.