ROSS Racing Pistons for the Chevrolet 409 are manufactured on advanced 2618-t6 forgings. Compression ratio is 10.5:1 with a stock cylinder head. They feature feature double spiral locks, forced pin oilers with oil distribution grooves, and lock removal indentations. They also include gas accumulator grooves in the second land, 5/64 5/64 3/16 ring grooves and can be used with Nitrous units up to 250 horsepower.
Part Numbers 83570, 83571, 83572 use Edelbrock heads.
ROSS Racing Pistons for the Chevrolet 409 are manufactured on advanced 2618-t6 forgings. Compression ratio is 10.5:1 with a stock cylinder head. They feature feature double spiral locks, forced pin oilers with oil distribution grooves, and lock removal indentations. They also feature gas accumulator grooves in the second land, as well as optional gas ports.
