Tired of your coolant tank blowing pressure, over heating blowing out stock gaskets. Or you didn’t realize you can’t use a 64.75mm bore or greater on a stock head and stock gasket. So you continue to pinch the gasket with piston pumping water. 
OEM RZ350 HEAD.
I CNC machined Head Gasket Delete
and O-Ring head mod. Fits 48H, 31k or 1UA.
 
*For the Purist that want to keep the OE sleeper Granny look. That are tired of $100 Head Gaskets. Our Replacement O-ring kit and washer are only  $15.00
 
*Tightens the squish and bumps
compression up = more aggressive throttle response and wheelies.
 
*removes the notorious head gasket that are common failures when doing performance and bore mods. On motors with bores 64.75 and bigger. (Stock head gasket only comes setup for 64mm to 64.75 bore) 
 
* adds 35-45 psi to continue use of 91octane+pump gas. Fits 64-66.50mm bore
 
O-rings are standard o-rings we use or other billet head options used on banshee if you In a pinch and need replace them.
 
Included
10-new crush washers to use original cap nuts
1-O-ring kit.
 
Ship us your head and we can mod it for $175