Product Description
Stop seepage and control crankcase pressure with the INDUSTRIAL INJECTION PDM-08300 billet race tappet cover for 1989–2002 5.9L Cummins. Built for P-pump applications, this stronger, machined cover eliminates the failure-prone factory rubber seal and adds dual large breather provisions for high-boost, high-RPM builds.
Fitment
- 1989–1998 12-valve 5.9L Cummins (VE & P-pump)
- 1998.5–2002 24-valve 5.9L Cummins (VP44) — race cover for P-pump style setups
- Chassis: Ram 2500/3500, 2WD/4WD
Key Features
- Billet aluminum, race-style tappet cover (P-pump applications)
- Eliminates factory rubber seal that’s prone to leaks
- Dual large breather ports (two ~2-3/4" crankcase vents) for better blow-by control
- Designed to seal with high-temp RTV (RTV not included)
What’s Included
- Billet tappet cover with dual vent provisions
- Hardware/breathers sold separately (see Recommended Parts)
Recommended Parts (CPP internal links only)
- CPP Billet Tappet Cover Breather (89–02) — mates to your billet cover
- Interstate-McBee M-3284623 Tappet Cover Gasket (89–02) or Cummins 3284623 OEM Gasket
- Interstate-McBee M-3900629 Tappet Cover Bolt (97.5–02)
- Industrial Injection PDM-07001 Freeze Plug Side Plate (89–02)
- Shop Cummins Tappets, Covers & Hardware
- Engine Dress-Up (Billet Covers, Caps & Breathers)
Cross-Reference / Alternatives
- Industrial Injection PDM-08152 Billet Tappet Cover w/ Breather (89–98)
- Industrial Injection PDM-08153 Tappet Cover (98.5–02) — no breather
- Beans Diesel 210105 Billet Tappet Cover (89–02)
- Crazy Carl’s Billet Tappet Cover w/ Breather (94–02 24V)
Helpful Notes
- Clean the block sealing surface thoroughly and follow a proper RTV bead & cure process before running.
- Route crankcase vent lines safely away from heat and rotating parts; add a catch can if needed.
- Verify pushrod/valvetrain clearance on non-stock cam profiles.
FAQ
Does this include breathers or fittings?No. This cover provides dual large breather provisions; add our billet breather(s) and hose to complete your setup (see Recommended Parts).
What sealant is required?High-temperature RTV silicone is required (not included). Apply an even bead, allow proper skin/cure time, then torque hardware evenly.
Will this work on a stock VP44 24-valve?It is a race-style P-pump cover. For a straightforward 98.5–02 replacement without added breathers, use PDM-08153 linked above.
What size are the breather ports?The cover includes two large crankcase vent openings (approx. 2-3/4") to relieve pressure on high-power setups.
