Speed Pro Piston Rings - 4.020 in Bore - Drop In - 1/16 x 1/16 x 3/16 in Thick - Standard Tension GEL-COMFORT-KIT 3/16 in Diameter Probe

3/16 in Diameter Probe

Designed for use with both nylon composite integrated manifold and stand alone aluminum coolant crossover manifolds

engines and 1971-72 Jeep 304 and 360 V8 engines with 4

Diameter Throttle Bores

Speed Pro Piston Rings - 4.020 in Bore - Drop In - 1/16 x 1/16 x 3/16 in Thick - Standard Tension GEL-COMFORT-KIT 3/16 in Diameter ProbeSpeed Pro designs and engineers pistons to meet the most demanding street performance and racing conditions. In combination, we draw upon more than 100 years of Speed Pro engine mastery to enhance the piston ring and its seal. Our Speed Pro brand is recognized for being a winner in every form of racing, and is the proven horsepower leader in oval track and drag racing. Hell Fire Rings: Speed Pro Hell Fire rings, manufactured from a specially hardened