ProTru by Wiseco 23 Degree Flat Top Forged Piston and Ring Kit - 4.060 in Bore - 1/16 x 1/16 x 3/16 in Ring Grooves - Minus 5.00 cc - Small Block Chevy PTS503A6 Hose Line & Tubing Griffin Aluminum Racing Radiators give

Griffin Aluminum Racing Radiators give your high-powered race car the advantage

An outstanding reproduction

Installation Tubing Kit

Patented Multicore design for maximum power

Adjustable by pass pressure using optional spring

ProTru by Wiseco 23 Degree Flat Top Forged Piston and Ring Kit - 4.060 in Bore - 1/16 x 1/16 x 3/16 in Ring Grooves - Minus 5.00 cc - Small Block Chevy PTS503A6 Hose Line & Tubing Griffin Aluminum Racing Radiators giveChevrolet Small BlockWiseco Pro Tru is a division of Wiseco specializing pistons and piston rings for price conscious engine builders. They offer complete kits to fit a wide range of engines. Manufactured by Wiseco Performance Products, ProTru Forged Pistons are affordable with features usually found only in more expensive pistons. Product Description: Piston and Ring 23 Degree Flat Top Forged 4. 060 in Bore 1 16 x 1 16 x 3 16 in Ring Grooves Minus 5.