Without the GKP adapter, fitting a genuine Mugen V2 to a US-spec K24A2 or K20Z3 is nearly impossible.
The Mugen V2 GKP is approximately 20% lighter than the stock Honda piston. Reduced reciprocating mass means the crankshaft has to work less hard to change the piston’s direction at TDC (Top Dead Center). mugen v2 gkp
: Load the (rz) CH Touchscreen 720p.gkp file into the app. Without the GKP adapter, fitting a genuine Mugen
However, for the serious oval track racer, the Jr. Dragster builder, or the mini bike enthusiast chasing a dyno record, the Mugen V2 GKP offers something intangible: Without the GKP adapter
: The tray-mount design results in varying acoustic profiles across the board. Reviewer Insights