Clutch Rollers, Set of 4, for TAPP Primary SIZE:'+3.5 mm including ignition maps referenced by

including ignition maps referenced by boost pressure and other safety/utility maps

The RPM diffuser installs behind the factory radiator directing hot air downward

and trail debris

Laser-cut steel

For testing purposes only

Clutch Rollers, Set of 4, for TAPP Primary SIZE:'+3.5 mm including ignition maps referenced byDESCRIPTION All EVP. MOde Spec TAPP primaries are calibrated with +2mm rollers. Bigger rollers make the low end quicker RPM's, shift out quicker, and lower the full shift RPM. This is due to arm angle and roller weight differences. +1mm Rollers Outside Diameter 16. 5 mm; weight 12. 5 grams each. +2mm Rollers Outside Diameter 17. 5 mm; weight 15. 3 grams each. +3mm Rollers Outside Diameter 18. 5 mm; weight of 18. 5 +3. 5mm Rollers Outside Diameter