cam,valves.porting,exhust.filter......

[mod300ex]

i have a cam,valves.porting,exhust.filter. on my quad would it make a little,mild,or huge diffrense if i get the hi compression piston and have it bored out>>>???or shuld i just get the powroll 385 kit would it make it less reliable?

[NTPRacing#19]

it will def pack more punch but depending on what high compression piston you get you might have to run race fuel and that will def make a bigger difference with the mods you have.

[mod300ex]

coo.when i take my quad apart ot get powdercoated i think ill do it