Product Description
Interstate-McBee M-3883284 Turbo Outlet O-Ring – HX35 / HY35 / HX40 / S300 – 1994–2002 5.9L Cummins
Replacement turbo outlet O-ring for the compressor discharge elbow on popular Holset and S300 turbos used with the 1994–2002 Dodge Ram 2500/3500 5.9L Cummins. Seals the joint between the turbo compressor outlet and the cast/aluminum outlet elbow to prevent boost leaks. Sold individually.
- Direct replacement: Designed as an OE-style seal for a proper fit at the turbo outlet.
- Boost-tight seal: Helps restore/maintain charge-air pressure and drivability.
- Durable construction: Built from high-quality elastomer for heat and oil resistance.
- Easy install: Simple swap during elbow/turbo service—no special tools required.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3883284 |
| OEM Reference | Cummins 3883284 |
| Location | Turbocharger compressor outlet (outlet elbow O-ring) |
| Sold As | Each (1 O-ring) |
| Typical Qty Required | 1 per turbo |
Vehicle & Turbo Fitment
Always verify by engine serial number (ESN) and turbo model tag when possible.
- Dodge Ram 2500/3500 5.9L Cummins (1994–2002, 12V & early 24V)
- Common turbo models:
- Holset HX35 / HX35W
- Holset HY35W
- Holset HX40 (select/aftermarket applications)
- BorgWarner S300 variants (select/aftermarket applications)
What’s Included
- (1) Turbo outlet O-ring, P/N M-3883284
Installation Notes
- Clean both sealing surfaces thoroughly; remove old seal material and debris.
- Lightly lubricate the new O-ring with clean engine oil before installation.
- Ensure the elbow seats squarely; tighten hardware evenly to avoid pinching the seal.
- After installation, pressure-test the charge-air system to confirm no leaks.
Recommended/Related Service Items
- Turbo outlet elbow bolts/hardware (inspect and replace as needed)
- Intercooler/charge-pipe boots and clamps
- Turbo oil feed/return gaskets & sealing washers (if servicing the turbo)
FAQ
How do I confirm this O-ring fits my turbo?
Check your turbo model tag (e.g., HX35W, HY35W, HX40, or S300 variant) and verify the outlet uses an O-ringed elbow connection. If unsure, compare the existing seal to this listing or contact us with your ESN and turbo model.
How many do I need?
One O-ring per turbocharger.
Will this fix my boost leak?
If the leak is at the compressor outlet/elbow interface, replacing a flattened, cut, or hardened O-ring often resolves it. Also inspect boots, clamps, and intercooler piping.
Why Buy From CPP Diesel
- Diesel specialists with ESN-verified fitment support
- Fast shipping and easy returns
- Deep inventory for Cummins B-Series service parts
