Product Description
MAHLE 9300738 MONOTHERM DLC-COATED PISTON PIN for the 1989–2007 5.9L Cummins delivers race-ready durability with a diamond-like carbon (DLC) wear surface and a precision 40.0 mm x 17 mm x 58.0 mm geometry. Designed for high cylinder pressures and reduced friction, this wrist pin is a direct fit when used with compatible pistons.
- Dimensions: 40.0 mm diameter (≈1.575"), 17 mm pin bore (≈0.67"), 58.0 mm length (≈2.283")
- Mass / Style: ~430 g, tapered/radiused ends
- Construction: Steel core with DLC coating for scuff and wear resistance
- Use case: Performance/competition or heavy-duty rebuilds
Fitment
- 1989, 1990, 1991, 1992, 1993 Dodge Ram 2500/3500 with 5.9L Cummins (12-valve)
- 1994, 1995, 1996, 1997, 1998 Dodge Ram 2500/3500 with 5.9L Cummins (12-valve/24-valve)
- 1998.5, 1999, 2000, 2001, 2002 Dodge Ram 2500/3500 with 5.9L Cummins (24-valve)
- 2003, 2004, 2005, 2006, 2007 Dodge Ram 2500/3500 with 5.9L Cummins (Common Rail)
Cross Reference / IDs
- MAHLE: 9300738
- High-performance cross ref: 111084HP (aftermarket listing referencing MAHLE 9300738)
What’s Included
- (1) DLC-coated wrist pin, 40.0 mm x 17 mm x 58.0 mm, tapered R, ~430 g
Install Notes
- Verify pin/bushing clearance and piston pin-boss width; use proper high-pressure assembly lube.
- Check rod bushing condition and concentricity before reassembly.
FAQ
Will this fit all 5.9L Cummins years from 1989–2007?
Yes—dimensionally correct for 5.9L applications when used with compatible pistons. Always confirm piston and rod spec before installation.
What does the DLC coating do?
DLC reduces friction and wear at high loads/temps, improving longevity in performance and towing builds.
Is this sold individually?
Yes, this listing is for a single wrist pin. Order quantity to match your piston set.
Do I need new rod bushings?
Recommended whenever fitting new pins—measure and replace/hone as required to spec.
