
OE
Pack of 1
OE
Pack of 1
GM Genuine Parts Engine Piston
GM Part #55484854
ACDelco Part #55484854
About this product
GM Genuine Parts Engine Pistons are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
- Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
- GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors.
- GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
- GM regularly updates production and service part designs to integrate new materials and technologies
Ring MaterialSteel
Piston Pin Inside Diameter0.5315 in / 13.5 mm
Top Compression Ring Thickness0.0472 in / 1.2 mm
ClassificationOE
Oil Ring Thickness0.0157 in / 0.4 mm
Second Compression Ring Thickness0.0472 in / 1.2 mm
Oil Spacer Ring Thickness0.0756 in / 1.92 mm
Piston Pin Outside Diameter0.8268 in / 21 mm
Piston Pin Length1.811 in / 46 mm
Ring Outside Diameter3.189 in / 81 mm
Piston Outside Diameter3.1878 in / 80.97 mm
Cylinder Bore Diameter3.1893 in / 81.008 mm
Piston MaterialAluminum Alloy
Piston Pin MaterialSteel
OversizedYes
Piston Head TypeDome
Piston Pin Incorporated BearingsNo
Skirt TypePartial
Assembly Lubricant IncludedYes
Ring MaterialSteel
Top Compression Ring Thickness0.0472 in / 1.2 mm
Oil Ring Thickness0.0157 in / 0.4 mm
Oil Spacer Ring Thickness0.0756 in / 1.92 mm
Piston Pin Length1.811 in / 46 mm
Piston Outside Diameter3.1878 in / 80.97 mm
Piston MaterialAluminum Alloy
OversizedYes
Piston Pin Incorporated BearingsNo
Assembly Lubricant IncludedYes
Piston Pin Inside Diameter0.5315 in / 13.5 mm
ClassificationOE
Second Compression Ring Thickness0.0472 in / 1.2 mm
Piston Pin Outside Diameter0.8268 in / 21 mm
Ring Outside Diameter3.189 in / 81 mm
Cylinder Bore Diameter3.1893 in / 81.008 mm
Piston Pin MaterialSteel
Piston Head TypeDome
Skirt TypePartial
24 Months/Unlimited Miles Limited Warranty for Parts (plus Labor if installed by a GM dealer)
Please visit our warranty page on Gmparts.com for full warranty details.
