ProTru by Wiseco Dome Piston - Forged - 4.280" Bore - 1/16 x 1/16 x 3/16" Ring Grooves - Plus 21.0 cc - Big Block Chevy - (Set of 8) HARN03F003 long duration applicationsWorks with electronic

long duration applicationsWorks with electronic ignitions and MSD Ignition Controls (ballast resistor required for points systems)100:1 turns ratio and lower primary resistance produce high voltage outputWindings are encased in blue epoxy and secured with extruded bracketsSpark plug style terminal and threaded brass primary studsSupplied with rubber shock mountsCARB E

Forged from premium quality SAE 1050 steel

GS3 and GS0 Series with 2-1/2" Springs

15" Steel Steering Wheel

Constructed of 6061-T6 aircraft aluminum or stainless steel

ProTru by Wiseco Dome Piston - Forged - 4.280" Bore - 1/16 x 1/16 x 3/16" Ring Grooves - Plus 21.0 cc - Big Block Chevy - (Set of 8) HARN03F003 long duration applicationsWorks with electronicChevrolet Big Block 454Wiseco 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 Dome Forged 4. 280 in Bore 1 16 x 1 16 x 3 16 in Ring Grooves Plus 21. 00 cc Big Block