COMPETITION HEAD GASKET(.43MM THINNER THAN STOCK)FOR HIGHER COMPRESSION RATIO.MAKE A BROAD HORSEPOWER GAIN COMPLETELY THROUGH THE RPM RANGE,SAFELY WITHOUT ANY MACHINE WORK TO YOUR ENGINE.HAVE BEEN MAKING FOR OVER 10 YEARS.FOR AMA/WERA/CCS/COMPETITION DRAG RACING.WEBSITE FOUND @DOCTORDUG,COM

SHIPPING IN THE US IS FREE...WILL SHIP ANYWHERE

Thickness available in.25mm or .50mm .(.STOCK IS .68MM) .25 will be shipped automatically unless otherwise specified.

This is intended for a stock bore 

FITS ONLY 1998-2003 YAMAHA R1

EMAIL ME IF THERES ANY QUESTIONS

 fITS 2003 ALSO DESPITE WHAT THE STUPID COMPATABILTY CHART SAYS, IT SEEMS TO KNOW MORE THAN I DO...