This is a brand new set of GM CNC LS9 cylinder. Uses GM LS3 valvetrain for the rockers or a aftermarket replacement. Del West titanium Intake valves and sodium filled exhaust valves. CNC Intake and Exhaust runners. Includes lash caps for the intake valves. Chevrolet Performance LS9 CNC-ported cylinder heads represent a new benchmark in factory engineering high performance, blending the strength and durability of the production LS9 cylinder head castings with the airflow enhancements of precision CNC porting. The result is about 10 percent more efficiency than the production casting, while delivering the greater strength built into the LS9–Rotocast from super-strong A356T6 aluminum alloy. With the Rotocasting method, the mold rotates to more evenly distribute the molten alloy, creating a denser casting that virtually eliminates porosity. And compared to the similar LS3 heads, Chevrolet Performance LS9 CNC-ported cylinder heads feature reinforced webbing and a thicker deck for greater rigidity and minimal distortion. The A356T6 alloy also manages the higher heat of a forced engine more effectively. The heads come fully assembled with production, lightweight titanium intake valves, sodium-filled exhaust valves, and strong beehive-type valve springs that can handle up to. Lift and can be installed on any LS engine with at least a 4.000 in. Bore using standard 11mm head bolts. Head P/N 19328743 assembled with the following. 12605524 Titanium Intake Valve (2.165). 12596508 Valve Spring Caps. 12605525 Sodium Filled Exhaust Valve (1.590). 10166345 Valve Stem Keys. 12625033 LS9 Beehive Valve Spring. 12482063 Valve Seal-Intake (Integral Seal & Spring Seat). 12482062 Valve Seal-Exhaust (Integral Seal & Spring Seat). 12596509 Rocker Arm Wear Pads (Intake valve only). The item “LS9 CNC-PORTED CYLINDER HEADS BY CHEVROLET PERFORMANCE 19328743″ is in sale since Monday, April 5, 2021. This item is in the category “eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Cylinder Heads & Parts”. The seller is “edwardsmt78″ and is located in Hendersonville, Tennessee. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Panama, Jamaica, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay.
- Modified Item: No
- Country/Region of Manufacture: United States
- Material: Aluminum
- Type: LS Cylinder heads
- Surface Finish: Brand New
- Manufacturer Part Number: 19328743
- Bore Size: 4.00
- Brand: Chevrolet
- Fitment Type: Direct Replacement
- Mileage: 0
- Warranty: No Warranty
- Mounting Hardware Included: No