Speed Pro Premium Piston Rings 4.120" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Moly 1950595 Your S197 needs to perform

Your S197 needs to perform

1965-1967 Mercury Caliente

it will never vary or fail

A game-changing method for accurately setting lash or pre-load while using non-adjustable style rockers

Speed Pro Premium Piston Rings 4.120" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Moly 1950595 Your S197 needs to performProduct Description: Piston Rings Performance 4. 120 in Bore Drop In 5 64 x 5 64 x 3 16 in Thick Standard Tension Steel Moly 8 Cylinder From pistons to engine bearing components, Speed Pro offers an array of performance engine parts. You can rely on Speed Pro for industry leading performance engine technologies, from cutting edge Digital Diamond Profiled pistons to A Series bearings. They are engine components performance enthusiasts and racers can