Product Description
Cummins 3802132 — Engine Piston Kit, .020" Over (0.50 mm) Marine-Style Bowl
MPN: 3802132 | Also Known As: marine bowl piston kit, .020 over piston kit | Notes: Large-bowl “marine-style” piston commonly used as a performance/driveability upgrade on 12-valve 5.9L builds.
Why This Part
- ✓ OE piston kit for .020" (0.50 mm) overbore rebuilds.
- ✓ Marine-style large bowl favored on 12-valve builds for drivability.
- ✓ Matched ring pack and OE geometry for sealing & longevity.
- ✓ Sold individually per cylinder; 6 required per engine.
Quick Specs
| Type | Engine piston kit (.020" / 0.50 mm oversize) |
|---|---|
| OE Part # | 3802132 |
| Bowl | Marine-style (large bowl) |
| Qty Required | 6 per engine (sold individually per cylinder) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1989–1998 | 5.9L Cummins 12-Valve (6BT) | Dodge Ram 2500/3500 |
Compatibility Notes: .020" oversize requires machine work (overbore/hone). “Marine-style” pistons were not factory-equipped on Dodge pickups; used as an upgrade by many builders. Always verify by ESN before ordering.
Often Paired With
- Other oversizes: 3802134 (.040"), 3802160 (STD) for 1989–1998 5.9L 12V
- Gasket set & head bolts for top-end refresh
- Rod/main bearings & new oil/filter after assembly
What’s In The Box
- (1) Genuine Cummins Piston Kit 3802132 — .020" (0.50 mm) oversize, marine-style bowl
- Includes piston kit components per Cummins packaging (piston, ring set, wrist pin & retainers)
Install Tips
- Confirm required oversize after machine shop measurement; maintain correct piston-to-wall clearance.
- Check ring end-gaps, orientation, and skirt clearance per Cummins spec.
- Verify piston protrusion and compression ratio when mixing components.
FAQ
WILL THIS FIT MY 1989–1998 5.9L 12-VALVE CUMMINS?Yes—this is specified for 5.9L 12-valve (6BT) applications when the block is bored .020" over. Always verify by ESN.
WHAT DOES “MARINE-STYLE” MEAN?It refers to the large-bowl piston crown geometry commonly used on marine/industrial variants and as a drivability upgrade on 12-valve truck builds.
HOW MANY DO I NEED?Six kits per engine (sold individually per cylinder).
DOES THIS INCLUDE RINGS AND A WRIST PIN?Yes—piston kits include the piston, matched ring set, wrist pin, and retainers packaged by Cummins.
CAN I USE THIS WITHOUT BORING THE BLOCK?No—.020" (0.50 mm) oversize requires proper overbore/hone. Use a machine shop to determine the correct size.
