This is a brand new set of CNC LS9 cylinder heads from GM. They have only been unboxed once to take pictures of them and that is it. The lash caps are for the intake valves. Uses GM valvetrain for the rockers or a aftermarket replacement. Titanium Intake valves and Sodium filled Exhaust valves. CNC Intake and Exhaust runners. This is what GM has to say about the heads. 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. Also check out my other listings for many other things and more to come. Located in Athens Ga. This item is for Sale Locally. The item “CHEVROLET PERFORMANCE 19328743 LS-SERIES LS9 CNC-PORTED CYLINDER HEAD COMPLETE” is in sale since Monday, December 14, 2020. This item is in the category “eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Cylinder Heads & Parts”. The seller is “aronshop” and is located in Athens, Georgia. 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