Product Description
MAHLE SS45963 is a top-hat style exhaust valve stem seal set (12 pieces) engineered to OE standards for the 2003–2007 5.9L 24-valve Cummins. These positive-stop seals help control oil at the valve guides and maintain factory performance. Application note: works on engine serial number 46239409 and up.
- Type: Top-hat / positive-stop valve stem oil seal
- Quantity: Set of 12 (exhaust side)
- Material: OE-grade elastomer with metal carrier
- Direct-fit replacement; no machining required
Fitment
- 2003, 2004, 2005, 2006, 2007 Dodge Ram 2500/3500 with 5.9L Cummins (24V Common Rail)
- Engine Serial Number (ESN): 46239409 and newer
Cross Reference Numbers
- MAHLE: SS45963, B45963
- Cummins: 3955394 (exhaust top-hat seal)
- Mopar/Chrysler: 5086862AA
- Fel-Pro: SS71186
- UPC/GTIN: 027067929754
FAQ
Will these fit my 2003–2007 5.9L Cummins?
Yes—designed for Ram 2500/3500 5.9L 24V (Common Rail). Verify your engine serial number is 46239409 or higher.
How many seals do I need?
This set includes 12 exhaust seals. Intake seals are separate; many builders replace all 24 seals during service.
Do these require machine work?
No—these are direct-fit OE-style top-hat seals; follow Cummins service procedures.
What symptoms indicate worn seals?
Cold-start blue smoke, increased oil consumption, or oil fouling at exhaust valves.
