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The only thing I can go by is my car.
My car 1st time out with a lid and catback my best pass was a 13.6@108. With the Headers I my best pass was a 13.1@110.. I have 3.42 10 bolt.
My car made 320rwhp and 328rwtq with the lid and catback and trapped 108mph
My car makes 340rwhp and 350rwtq now with the macs and trapped 110mph
So for 20 more hp and 22more ftlbs I gained 2 mph
Mikes SS makes 425rwhp and 400rwtq and traps 115mph with really no tune (I have my Maft translater on it). His car needs to have a full tune done to it. I also dont know what type of power a LS6 clutch can handle but maybe a stonger clutch would help also!
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Jeff
2002 WS6 T/A.. M6..Built 383 TMR tune..461rwhp,458rwtq
2009 G8 GT. Bone stock 13.6@103.. Vararam Intake, GXP Axlebacks, LS2 FRC's
1998 Corvette Convertible, Vararam Intake+Power Duct, Fast 90/90, Ti Axleback..12.8@110
2003 Cobra Convertible 10th Anniversary
http://www.fquick.com/slow-v6
Local car cruise schedule..
http://www.cliffscalendar.com/
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