Hastings 2M 683
Standard-size plasma-moly ring set for 8 cylinders with 4.250" / 107.95 mm bore and 5/64-5/64-3/16 ring pack.
Hastings 2M683 is a complete standard-size plasma-moly piston ring set for eight-cylinder engines with a nominal 4.250" / 107.95 mm cylinder bore. The set uses a plasma-moly top ring, a phosphate-faced second ring, and a standard-tension three-piece oil ring.
Application / fitment
This is a dimensional set for selected V8 engines using a 4.250" bore and 5/64" × 5/64" × 3/16" piston-ring grooves. Common applications include production-style Chevrolet 7.0 / 427 and 7.4 / 454 pistons and selected Chrysler / Dodge 6.3 / 383 and 7.0 / 426 pistons when the exact ring pack is present.
- cylinder bore: 4.250" / 107.95 mm
- size: standard / STD
- cylinder quantity: 8
- top ring: 5/64" / 1.98 mm
- second ring: 5/64" / 1.98 mm
- oil ring: 3/16" / 4.76 mm
- installation type: drop-in, not a file-fit set
Measure every cylinder, piston-groove width and depth, and ring end gap before installation. Check each ring in its assigned cylinder and follow the manufacturer orientation markings.
Technical information
- part type: piston ring set
- top ring: steel or ductile-iron ring with plasma-moly facing
- second ring: phosphate-coated face
- oil ring: carbon-steel three-piece design
- ring tension: standard
- contents: rings for 8 pistons
- sale unit: 1 complete engine set