[arcticcat522]

Originally Posted by ONDEMAND

I can confirm that the N55 135 with tune only will easily roll past the 150 mark, this is in mexico of course!

You may be very experienced in driving at high speeds but I must ask.....Have you ever driven + of 140 mph? Things happen very quickly and to be honest with just aftermarket springs and non rft's 150 is EXTREAMLY floaty feeling and propably not the best idea (although I survived.) The way you apply brakes and steering must be very controlled and precise. Control the way weight shifts carefully!

Look at coilovers and a pro shop to help set them up form your intended speeds.

Be careful and good luck in pursuit of maxing out the 135!

^^^fixed