Primary Clutch / Oversize Rollers Roller Size:1mm Oversize Rollers This cuts cost because you

This cuts cost because you are not paying for all the shims that normally come in the kit

Extensively dyno-tested to maintain or gain horsepower throughout the entire RPM range

you must destroy the original emission labels

After intercooler temp - influences timing and desired boost to prevent detonation and pre-ignition

and work so well

Primary Clutch / Oversize Rollers Roller Size:1mm Oversize Rollers This cuts cost because youTune your TRA to perfection with these stock or oversize rollers for your primary. Stong construction will not wear out quickly and roll extremely smooth. Choose from stock (10 gram), 1mm oversize (12. 5 gram), or 2mm oversize (15. 5 gram). Sold as a set of three.