Enginetech R40058
Piston ring set for V8 engines with 4.000” / 101.60 mm bore. 5/64” / 5/64” / 3/16” ring package.
Enginetech R40058 is a piston ring set for engines with a 4.000” / 101.60 mm bore and a 5/64”, 5/64”, 3/16” ring package. It is intended for eight-cylinder applications that use this ring size.
Application / fitment
Typical use includes selected 4.000” bore V8 engines such as Chevrolet SBC 327/350/400, Ford 289/302/351W and selected Chrysler, Dodge, AMC, Buick, Cadillac, GMC, Jeep, Lincoln, Mercury, Oldsmobile, Plymouth and Pontiac applications. For piston rings, bore size and piston groove widths are the critical fitment points.
- bore: 4.000” / 101.60 mm
- cylinders: 8
- top ring: 5/64” / approx. 1.98 mm
- second ring: 5/64” / approx. 1.98 mm
- oil ring: 3/16” / approx. 4.76 mm
Before installation, check ring end gap in the cylinder, piston groove condition and actual bore size after honing. This number refers to the 4.000” size; other bore sizes require the matching set variant.
Technical information
- type: piston ring set
- ring outside diameter: 4.000” / 101.60 mm
- ring pack: 5/64” / 5/64” / 3/16”
- material/style: cast set
- use: V8 engines using 4.000” 5/64-5/64-3/16 ring package