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Old 10-20-2017, 07:23 AM   #20
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Join Date: Apr 2008
Posts: 585
The r1 could have same problem as the fz1 did. That nice dip because of the header design flaw. Once you up the compression with gasket and the better header maybe that dip goes away and you keep mid range and gain the top end. Maybe one day, I do know jlewis tried it but didn’t use exhaust cam though and said it was a waste of time and money.
99 Trans Am - Forged 347, with nitrous.. M6
2008 Yamaha FZ1 9.83 @ 140
Ivan's flash, pc5, filter, and slip on.
1993 mustang coupe with ls1. Oh and N2O.
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