The 75 mm will give you about 2 more hp when match witht he correct plenum. Also, if you have plans for a blower down the road, the 75 will be better. I tend to think that the 70 mm idle a little better, though.
__________________
Black 2000 GT Vert: Novi-2000 with Intercooler (375rwhp @ 9 psi); Tune by Kauffmans; Roush 380R Body kit; Steeda Subframes; Steeda Strut Tower Support; Deep Dish Bullets; FRPP 4:10's; SCT 4 Position Chip with four custom tunes; Steeda CAI; C&L Pleum; BBK 75 TB; SLP Loudmouth; SLP Catted X-Pipe; Bullitt Suspension; UPR Conrol Arms; Focus Fuel Pump
My Car
My Email
|