Speed Pro Piston Rings, Plasma-Moly, File-Fit, 4.125 in. Bore, 5/64 in, 5/64 in, 3/16 in. Thickness, V8, Set

Plasma-moly rings built for the heat and load of serious V8 work.

• ▸Plasma-moly top ring runs cooler with less friction under load
• ▸File-fit design lets you dial in end gap precisely for your bore
• ▸Correct gap means ring lands survive extended WOT and repeat runs
• ▸5/64 top, 5/64 second, 3/16 oil — proven street/strip dimensions
• ▸Supplied oversized so nothing is left to chance at the ring filer

“Power means nothing until the rest of the car can use it.”

Cast iron rings compromise under sustained heat. The plasma-moly face coating on the top ring resists wear and transfers heat away faster, which matters when the motor is loaded hard run after run. File-fit construction means the end gap is set for your specific bore and application, not averaged across a production run — that precision is what keeps ring lands intact.