I'm running a 2.0 zvh engine in my rst at the moment.

As we all know zvh's don't like to revv verry well...

Wanting to raise my revvs i would like to know what's the most restricive at first and work on that..

current setup is . 2.0 zvh 8:1 cc , slightly poted/polished head with standard size valves and kent 35 cam , stage 3 t3 turbo.
Peak power at the moment is at 5550 rmp and the engine max is 5850 rmp.

What would be the best way to go?...

better inlet- exhaust manifold... workig more on the head.. bigger valves.. other cam..

Don't need the revvs to go out the roof but like 500 rpm more would be great.

Thanx