Hastings 4.310" Bore Piston Rings File Fit 5/64 x 5/64 x 3/16" Thick Low Tension - Moly M593 The Top Air system fits

The Top Air system fits over the forward two holes and extends down the front of the helmet and just under the top of the visor

Degree Wheel - 16"The COMP Cams philosophy has never changed: make the highest performing products possible and lead the industry in technological development

425 in Long

2-7/8 in Smart Tube

Hastings 4.310" Bore Piston Rings File Fit 5/64 x 5/64 x 3/16" Thick Low Tension - Moly M593 The Top Air system fitsProduct Description: Piston Rings Premium Ductile Moly 4. 310 in Bore File Fit 5 64 x 5 64 x 3 16 in Thick Low Tension Ductile Iron Plasma Moly 8 Cylinder For nearly 100 years, Hastings has earned its reputation as a leader in piston ring technology.