2188417 PACCAR MX-13 EPA17 CGI Loaded Cylinder Head – New, Stage 5 Inconel
| Brand | JAK's Diesel |
| Part Category | Cylinder Heads |
| Engine Make | PACCAR |
| Engine Model | MX-13 · MX13 |
| Condition | New |
| Stage / Tier | Stage 5 |
New, fully loaded Stage 5 cylinder head for the PACCAR MX-13 EPA17, built to replace PACCAR 2188417 (2188417PEX) and 2184940PE. It uses a compacted graphite iron (CGI) casting with Inconel valves. It arrives assembled and ready to bolt on, with no core to send back.
What's Included
- New CGI (compacted graphite iron) cylinder head casting
- New intake and exhaust valves (Stage 5 — Inconel valves)
- New valve springs, retainers and keepers
- Valve guides and valve stem seals installed
Not included: head gasket set, head bolts, injectors, rocker assemblies. Ask us and we will quote the matching gasket set and bolt kit.
Specifications
| Replaces | PACCAR 2188417, 2188417PEX, 2184940PE and cross-references below |
| Engine | PACCAR MX-13 EPA17 (Kenworth / Peterbilt) |
| Condition | New — no core |
| Assembly | Loaded (valves, springs, retainers, keepers, guides, seals) |
| Valve package | Stage 5 — Inconel valves |
| Casting | CGI (compacted graphite iron) |
| Brand | JAK's Diesel |
Fitment
Fits PACCAR MX-13 EPA17 engines in Kenworth and Peterbilt trucks that use the 2188417 head. For EPA13 engines, see our MX-13 EPA13 head. We confirm fitment by engine serial number (ESN) or casting number before every head ships.
Replaces / Cross-Reference Part Numbers
OEM and reman numbers: 2188417, 2188417PE, 2188417PEX, 2184940, 2184940PE, 2125763, 2125763PE, 707766AT
Shipping, Core & Warranty
- No core charge, no core return. This is a new casting, not an exchange unit.
- Freight: ships crated by LTL freight. Freight is free to a commercial address with a forklift or dock. Residential, liftgate and terminal delivery can be quoted — call before you order.
- Local pickup: available in Henderson, CO by arrangement.
- Warranty: 1 year against defects in materials and workmanship.
Frequently Asked Questions
Is this head new or remanufactured?
New. It is a new casting assembled with new valvetrain components — not a rebuilt core.
Do I have to send back a core?
No. There is no core charge and nothing to return.
What else do I need to install it?
Plan on a new head gasket set and head bolts for the MX-13. They are not included. Message us and we will match the right kit to your engine serial number.
How do I confirm it fits my MX-13?
Send us your engine serial number (ESN) or the casting number from your old head. We verify fitment against 2188417 before the head ships.
Is the EPA17 head the same as the EPA13 head?
No. PACCAR changed the head between emissions generations. Send us your ESN and we will confirm which one you need.
What is a CGI cylinder head?
CGI is compacted graphite iron. It is stronger and more resistant to cracking from heat cycling than standard gray-iron castings, which is why it is used on high-output and high-EGT builds.
How long does delivery take?
Heads are crated and handed to the LTL carrier in 1–2 business days. Transit is typically 2–5 business days depending on your location.
Questions? Call JAK's Diesel at (720) 445-6249. See all PACCAR MX-13 parts or diesel cylinder heads.
Discovery models are listed below. Confirm the complete application and any ESN/CPL or size restrictions before ordering.
