KB Performance Pistons Hypereutectic Flat Top Piston and Ring Set - 4.040 in Bore - 5/64 x 5/64 x 3/16 in Ring Grooves - Minus 7.00 cc - Small Block Chevy 20602S Utilizing a hearing aid transducer

Utilizing a hearing aid transducer instead of a standard speaker

8 in Collector Length

85:1 turns ratio and lower primary resistance produce high voltage output

1-7/8 in Primary

KB Performance Pistons Hypereutectic Flat Top Piston and Ring Set - 4.040 in Bore - 5/64 x 5/64 x 3/16 in Ring Grooves - Minus 7.00 cc - Small Block Chevy 20602S Utilizing a hearing aid transducerProduct Description: Piston and Rings Hypereutectic Flat Top 4. 040 in Bore 1. 433 in Compression Height 5 64 x 5 64 x 3 16 in Ring Grooves Minus 7. 00 cc Small Block Chevy Keith Black pistons have several important advantages over conventional alloy pistons. KB Hypereutectic Pistons high silicon content yields superior thermal and wear characteristics, greater strength, scuff and seizure protection, and resistance to cracking. High silicon content