I just installed a 50 series delta flow, single in single out (center inlet) exhaust. Part # 942550. It sounds extremly throaty and has a DEEP tone at high and low rpms, i like it a lot. Ive done a lot of reaserch on these exhausts and found that this would be the exact sound I need. I was going to install the super 40 but found that a lot of you guys on the site were complaining about too much noise in the cab and sounding a little ricey at high rpms. I would highly recomend purchasing the 50 series delta flow.
PS The clip in the database sounds good but in person the exhaust sounds freekin awsome.
FOR SALE - SS Gen II bumper cover - PM me