speed pro piston rings, plasma-moly, 4.155 in. bore, 1/16 in, 1/16 in, 3/16 in. thickness, 8-cylinder, se

Speed-Pro® delivers the power you need and the value and quality that you deserve. Whether you are running at the track, chasing trophies on the strip, or just cruising down the road, count on Speed-Pro® to provide the best value in HP engine components

• Recommended for all racing applications (where file fitting the ring end gap will deliver maximum power)


• Face of top rings are coated with the latest generation Plasma-Moly


• Plasma-Moly ring face decreases friction and is highly resistant to scuffing


• Ensures dependable performance and superior service life


• Application specific design to ensure a perfect fit and correct operation for unsurpassed quality that you can trust

Bore (in.): 4.125 in.

Piston and Ring Oversize (in.): 0.030 in.

File Fit: Yes

Gapless: No

Gas Ported: No

Top Ring Included: Yes

Top Ring Thickness: 1/16 in.

Top Ring Material: Iron

Top Ring Facing Material: Plasma-moly

Second Ring Thickness: 1/16 in.

Oil Ring Thickness: 3/16 in.