Product Description
MAHLE 224-3523WR.020 marine-bowl piston kit with rings for the 1989–1998 Cummins 5.9L 12-valve. Engineered to OE standards with expansion-controlled design, floating 40 mm wrist pins, and a factory-matched ring pack, this .020" oversize set is a proven solution for fresh builds that want the marine/QSB-style bowl for mixture quality and durability under load.
Why it wins: stable skirt geometry, reliable oil control, and consistent ring loading for towing and performance. The marine bowl focuses combustion for cleaner burn and excellent heat management when fueling is increased.
Fitment
- Dodge/Ram 2500 & 3500 with 5.9L Cummins 12-valve (1989–1998)
- Oversize: .020" (approx. 4.016") – requires machine overbore/hone to spec
- Includes: Set of 6 pistons with rings, wrist pins & clips (as supplied by MAHLE)
- Note: For 1994–1998 builds, verify bowl style/compression height for your head & piston combo
Cross-Reference / Alternatives (MAHLE on CPP Diesel only)
- Same piston – STD: MAHLE 224-3523WR (STD)
- Same piston – +.040: MAHLE 224-3523WR.040
- Standard-bowl family (’94–’98) – +.020: MAHLE 224-3520WR.020
- Standard-bowl family (’94–’98) – STD: MAHLE 224-3520WR (STD)
Specifications for Mahle 224-3523WR.020
| Attribute | Value |
|---|---|
| Brand | MAHLE |
| Part Number | 224-3523WR.020 |
| UPC | 027067913579 |
| GTIN | 027067913579 |
| Engine | Cummins 5.9L 12-valve (B-series) |
| Bowl Style | Marine/QSB-style |
| Oversize | .020" (approx. 0.50 mm) |
| Pin Diameter | 40 mm (floating) |
| Includes | (6) pistons, rings, wrist pins & clips |
| Shipping | Free Shipping; carrier and transit shown at checkout |
| Prop 65 | This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Learn more. |
FAQ
Is the price per piston or for a full set?
At CPP Diesel, the price is for a complete set of six (6) pistons with rings.
Will this fit my 5.9L 12-valve?
Yes—this .020" oversize marine-bowl set is specified for 1989–1998 5.9L 12V builds. For 1994–1998 engines, confirm bowl style and compression height for your head/piston combination.
Are rings included and pre-installed?
Rings are included and should be sized/gapped and installed per MAHLE/Cummins spec during assembly.
