Kill Devil Diesel O-Ring Cylinder Heads 120lb Springs 08-10 Ford 6.4L Powerstroke. Our popular O-ring heads start off with a 100% brand new casting made just for us, to our exacting specifications. We have improved several key design flaws with the factory cylinder heads - KDD castings incorporate a higher nickel content and thicker deck surface for a more rigid casting, and hardened alloy valve seat inserts (to prevent cracking of the valve seats like the factory heads are notorious for).
We receive our castings bare, then do all the finish machine work in house, including our proprietary O-ring design. We O-ring all of our 6.4 Powerstroke heads because it virtually eliminates the head gasket issues these engines were plagued with from the factory. A receiver groove is machined into the deck surface of the heads and our USA made stainless wire is pressed into the groove - the wire protrudes from the groove applying extra pressure to all layers of the MLS gaskets - sealing combustion pressure in the cylinder. The high carbon stainless wire we use wont compress or deform over time and is reusable should you have the heads off of the engine for any reason in the future.Our O-ringed heads work with any standard off the shelf head gaskets, and dont require any special machining of the block - just prep the deck surface ensuring the block is clean, dry, and flat. The iron matrix valve guides are diamond honed to size leaving a smooth cross-hatch finish in the valve guide similar to the cylinder bore, which provides superior oiling and wear resistance in the demanding diesel application.
We then hand assemble the heads with our new USA made valves and springs to our proprietary blueprint specifications, eliminating sloppy factory tolerances and correcting the poor valvetrain/lifter geometry. We use a quality bonded style valve stem seal so they dont blow the seals apart like the factory crimped seals do. Valve Springs: Stage 3 - 120lb. We value your business and we are not satisfied until you are. Rudy's Performance Parts ships products from multiple warehouses across the country in order to get your products to you the quickest way possible.We are not able to send ANY race use products to the state of California. According to the EPA Clean Air Act, they are illegal for use on any Federal, State, or Local public highways and illegal use is punishable by the penalties enacted by the mentioned laws. Rudy's Performance Parts does not condone or promote illegal use of these products. All of our parts and accessories are returnable and refundable. The item in which you are returning MUST be unused, uninstalled, in the original condition, and in the original packaging. If you are returning an item due to an error caused by Rudys Performance Parts or its business partners i. If you are sending an item back, we recommend using a service with tracking and signature confirmation. This product is NOT for sale or use in California. The item "Kill Devil Diesel O-Ring Cylinder Heads 120lb Springs 08-10 Ford 6.4 Powerstroke" is in sale since Friday, January 8, 2021. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Engines & Engine Parts\Gaskets, Seals & Hardware\Gaskets & Seals". The seller is "rudys_performance_parts" and is located in Chapel Hill, North Carolina. This item can be shipped to United States, Canada.