Speed Pro Economy Piston Rings 3.875" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Iron - 6-Cylinder M59LC H43 Rubberized Behind the Head

H43 Rubberized Behind the Head (BTH) 2-Way Radio Headset

330 lb/in Spring Rate

AFR's spread port head has all the benefits and features of AFR's standard head

One Spring & Copper Washer inside of adjustment wheel to maintain correct torque and tension to close up any remaining gaps

Speed Pro Economy Piston Rings 3.875" Bore 5/64 x 5/64 x 3/16" Thick Standard Tension - Iron - 6-Cylinder M59LC H43 Rubberized Behind the HeadProduct Description: Piston Rings Economy 3. 875 in Bore Drop In 5 64 x 5 64 x 3 16 in Thick Standard Tension Cast Iron Phosphate 6 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