Product Description
MAHLE 224-3673WR.040 PISTON KIT W/RINGS (.040) – 04.5–07 CUMMINS 5.9L
Premium OE-quality .040" oversize pistons for 2004.5–2007 Ram 2500/3500 5.9L Cummins (VIN C, engine code ETH). Includes mounted rings, pins, and clips. CPP DIESEL PRICE IS FOR A COMPLETE SET OF 6 PISTONS WITH RINGS (ready to install). Compression ratio approx. 17.1:1.
- Application: 5.9L Cummins 24-valve (common-rail HO), 2004.5–2007
- Oversize: .040" (approx. +1.0 mm)
- Includes: 6 pistons, rings (installed), 6 pins, 12 clips
- Ring grooves: ~3.0 mm / 2.0 mm / 3.0 mm
- Design: Bowl-type crown; expansion-controlled skirt; compensated ring grooves
Fitment
- 2004.5, 2005, 2006, 2007 Dodge Ram 2500 / 3500 with 5.9L Cummins (VIN C, CR)
Cross Reference & IDs
- Cummins: 3970127
- UPC/GTIN: 027067933416
- MAHLE MPN: 224-3673WR.040
FAQ
Is the price for one piston or a full set?
At CPP Diesel, the price shown is for a complete set of 6 pistons with rings.
Will these fit my 2006 Ram 3500 5.9L?
Yes, they fit 2004.5–2007 5.9L Cummins (VIN C, common-rail). Always confirm VIN/engine code ETH before ordering.
What’s included in the box?
Six pistons, pre-installed rings, six wrist pins, and pin clips—everything needed to assemble the rotating group.
Do I need machine work?
Yes—.040" oversize requires proper boring/honing and correct piston-to-wall clearances.
Compression ratio and ring sizes?
Nominal CR ~17.1:1; typical ring grooves ~3.0/2.0/3.0 mm. Verify final specs with your machinist.
