Speed Pro Speed Pro Piston Hypereutectic 4.040" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 6.9 cc Backing Plate T-Bolt One radio is "listen only"

One radio is "listen only" for race ops while the other provides full communication to your driver

70 / 75 mm

Flows 26 Percent Better Than Factory Intake System 5

and 20 years in automotive competition

BlackHeart is engineered to provide maximum exhaust velocity

Speed Pro Speed Pro Piston Hypereutectic 4.040" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 6.9 cc Backing Plate T-Bolt One radio is "listen only"Product Description: Piston Speed Pro Hypereutectic 4. 040 in Bore 5 64 x 5 64 x 3 16 in Ring Grooves Minus 6. 90 cc Coated Skirt Small Block Chevy Set of 8 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