to hit 160 mph you really will need the higher revs so the roller rockers kit could help will that.
Yeah and nuts the size of a bull.
Not accounting for wind or any other variations to hit 160mph in one of these with stock gearing you'd need to hit 7000 RPM I think you'd need a little more help than just the roller rockers.
That said, have you taken yours up to the limit with the roller rockers installed, or would that also require flashing the ECU for a higher rev limiter. Not sure if once the ECU is unlocked after the initial bedding in window if it just bumps the limiter or removes it all together.
