Explain this.

tekslk said
Going from a hyd lifter and rocker assyemly, to a hyd lifter with 1.6 roller rocker, what exacly does this do for car as far as performance, rpms etc.

It won't affect the power band, as the duration will not change. Just the overall lift and speed of the valve opening will change. It will flow better at max lift of the cam.

It will also get lower MPG with more lift.... :banghead: