The Chevrolet Performance piston ring set is a low-tension, 4.000 in bore ring set for Small Block Chevy engines, supplied as a complete set of eight for the 604 crate engine and similar GM Small Block Chevy applications.
Specifications:
- Type: Piston ring set
- Bore size: 4.000 in
- Ring pack thickness: 2.0 mm, 1.5 mm, 4.0 mm
- Tension: Low tension
- Configuration: 8-cylinder
- Quantity: set of 8
- Engine family: Small Block Chevy
- Sold as: Kit
- Part number: 12499231
Applications:
- Chevrolet Performance 604 Small Block Chevy crate engine
FAQ
What bore size do these rings fit?
They fit a 4.000 in bore.
How many rings are in the set?
It is a complete set of eight for an 8-cylinder engine.
What is the ring pack thickness?
2.0 mm, 1.5 mm, and 4.0 mm.
Are these low-tension rings?
Yes. They are a low-tension ring set.
What engine are they for?
Small Block Chevy applications, including the Chevrolet Performance 604 crate engine.

