Kill Devil Diesel L5P Duramax Cylinder Heads
SKU: L5P-CH-001
- Refundable Core Charge: "Cores" are used parts that can be used in re-manufacture. The Refundable Core Charge is added to your order and when you send your “core” in, we assess the value and will refund up to the Refundable Core Charge amount. +
- Regular Price Plus Core: $2,499.00 USD
KDD Duramax Diesel Cylinder Heads – Pair (L5P 2017–Present)
KDD Duramax Cylinder Heads are built from 100% new heavy-duty castings and machined, inspected, and assembled in-house. Available in HD O-ringed or CNC Ported Performance configurations, they're designed for everything from daily driving and towing to higher-performance builds.
Available Options
HD O-ringed
A dependable replacement option for daily-driven trucks, work trucks, towing applications, and stock or mildly modified engines.
CNC Ported Performance
Adds CNC machined intake and exhaust ports for improved airflow and increased performance potential. Ideal for modified street trucks, larger turbo and injector combinations, competition builds, and higher-horsepower Duramax engines.
Features
- 100% new heavy-duty cylinder head castings
- O-ringed to prevent head gasket failure
- Finish machining performed in-house on KDD CNC equipment
- Premium hardened valve seats and heavy-duty valve guides
- Precision-honed valve guides
- Pressure tested and vacuum checked
- Built to KDD valvetrain specifications
- New valves, springs, retainers, locks, and valve stem seals
- Valve springs pressure tested for consistency
- Sold as a complete pair
- No core charge or return shipping
- Free shipping
- 12-month replacement warranty against defects in materials and workmanship
CNC Ported Performance Includes
- CNC machined intake and exhaust ports
- CNC blended bowl and valve-seat transitions
- KDD performance valve job
Built In-House
KDD cylinder heads are received as bare castings and finished, inspected, and assembled in-house. Each set is checked for proper guide clearance, valve sealing, valve recession, spring height, and valvetrain geometry.
The result is a complete, ready-to-install cylinder head built with new components and no core required.
Fitment
- L5P: 2017–Present Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD
Contact KDD if you are unsure which cylinder heads fit your application.
Warranty
KDD Duramax cylinder heads include a 12-month replacement warranty against defects in materials and workmanship.
Please note: Cylinder-head shipments require a signature at delivery.