Product Description
MAHLE 224-3666WR-0.75MM piston kit with rings for the 2008–2010 Ford 6.4L Power Stroke (VIN “R”). OE-quality pistons with coated skirts and the correct RFK13PF ring pack deliver factory-grade durability and oil control in a .75 mm oversize (approx. 0.030"). Price on this page is for a complete set of eight (8) pistons with rings, pins, and pin retainers.
Highlights
- Oversize: .75 mm (approx. 0.030") • Bore: 3.895"
- Ring pack: RFK13PF • Ring thickness/width (per XDP spec): 0.151" / 0.096"
- Coated skirt to reduce friction and wear
- Includes: 8 pistons, rings, piston pins, and pin retainers
Fitment
- 2008, 2009, 2010 Ford Super Duty F-250 / F-350 / F-450 / F-550 with 6.4L Power Stroke diesel (VIN Code “R”).
What’s Included
- (8) pistons w/ rings pre-matched, plus pins and pin retainers
Install Notes
- Machine shop bore/hone required to .75 mm oversize; set ring gaps to MAHLE spec.
- Verify VIN “R” and 6.4L application before ordering.
Cross-Reference / Related MAHLE Part Numbers
- Same application, other sizes: 224-3666WR (STD), 224-3666WR-0.25MM, 224-3666WR-0.50MM
- Related 6.4L designs: 224-3851WR (MaxxForce 7), 224-3953WR (reduced compression)
- UPC/GTIN: 027067927415
FAQ
Is the price for one piston or all eight?
The price on this CPP Diesel page is for a complete set of eight (8) pistons with rings, pins, and retainers.
Do these fit all 6.4L Power Stroke trucks?
Yes—fits 2008–2010 Ford Super Duty models equipped with the 6.4L Power Stroke (VIN “R”).
What does .75 mm oversize mean?
It’s approximately 0.030" over stock; cylinder boring/honing to this size is required.
What’s included in the kit?
(8) pistons, RFK13PF ring sets, pins, and pin retainers—ready for professional installation.
Are the skirts coated?
Yes, the pistons feature a friction-reducing coated skirt for durability and oil control.
