IF YOU ARE USING A 30MM INTAKE YOU WILL WANT THIS SPACER TO REPLACE THE SMALLER STOCK 24MM PLASTIC ISOLATOR SPACER.

BORE IS 30MM TO BETTER FEED YOUR CYLINDER WITH YOUR LARGER INTAKE UPGRADE, AND BEING ALUMINUM LESSENS THE CHANCE OF CRACKING FROM HEAT STRESS LIKE THE STOCK PLASTIC SPACER,

*INCLUDES GASKET