Description
5.9L Cummins O-Ringed Cylinder Head w/ 103lb Springs & Gasket Kit (2003–2007)
Built to Withstand 1000HP – Designed for High-Performance 5.9L Builds
Maximize top-end durability and boost-holding capability with this O-ringed cylinder head kit for your 2003–2007 5.9L Cummins. Featuring performance-rated 103lb valve springs and a custom-designed O-ringed sealing surface, this setup addresses common head gasket failures seen at the 600+ HP mark. This kit also includes a head gasket set, making it an ideal choice for engine builds targeting up to 1000 horsepower.
✅ Kit Includes:
-
Brand-new O-ringed 5.9L Cummins cylinder head
-
103lb heavy-duty valve springs – ensures valve control at high RPM
-
Custom head gasket set designed specifically for O-ringed heads
-
Assembled and ready for installation
🔧 Fitment:
-
Fits 2003–2007 Dodge Ram 2500 & 3500 with 5.9L 24V Cummins diesel engine
🛠️ Performance Notes:
-
Designed to eliminate head gasket failures under high boost and power
-
Pair with medium-strength head studs to handle up to 1000HP
-
Recommended: drill and tap freeze plugs under valve cover for high-RPM use
-
Installation instructions included
This kit is built from the ground up for high-performance diesel applications. Whether you’re racing, sled pulling, or building a powerhouse tow rig, this O-ringed cylinder head kit provides the top-end strength you need to push your 5.9 Cummins to the limit.
