EVOLUTION PIT BIKE 2 VALVES RACE HEAD FOR ZS155, GPX, YX160cc

This head cylinder kit improve hig end RPM performance and reliability

It includes:
- Complete GPX 02 head
- Titanium valve lightweight retainers
- Hard spring valves


Important Note: This kit does not contain a piston and camshaft.  This head works perfectly with stock YX/GPX camshaft, pistons or TB Parts pitston code TBW9028. It's avaliable black color, gray or gunmetal.