These are the TFS GenX LS3 255cc intake runner aluminum heads with 69cc chambers, titanium retainers. And a max lift of. Looking for serious LS3 horsepower? Trick Flow engineers combined the best features of factory GM LS3 and LS7 cylinder heads with Trick Flows own unique brand of race-winning engineering and technology to create the ultimate square port LS cylinder head for 4.000 and larger bore enginesthe GenX® 255. The heads feature fully CNC Competition Ported runners with a premium high resolution surface finish for maximum airflow and performance potential. The valve angles have been changed from 15° to 12° to increase piston-to-valve clearance and allow the use of larger camshafts. The coolant holes through the head deck were redesigned to work with all LS head gasket and engine block combinations. Stock LS3 ports accommodate LS3-style intake manifolds and LS9/LSA blower assemblies. GenX 255 heads are available with standard and 6-bolt per cylinder mounting patterns. Cylinder heads are available fully assembled or as bare castings. Accessory Bolt Holes Drilled. Combustion Chamber Volume (cc). Exhaust Runner Volume (cc). Exhaust Valve Diameter (in). Intake Runner Volume (cc). Intake Valve Diameter (in). Maximum Valve Lift (in). Includes new rocker arm rail mounts for use with LS3 1.7 ratio rocker arms. OEM rocker arm rail mounts will not work with these heads. Number of Springs Per Valve. Outside Diameter of Outer Spring (in). Rocker Arm Nut Thread Size. Rocker Arm Nuts Included. Rocker Arm Studs Included. We do not lower invoice values since it is a violation of US and International custom laws. Let us work to resolve your problem so everyone is happy. Suite D7 Costa Mesa, CA 92627. TREperformance 1725 Monrovia Ave. The item “Trick Flow GenX 255 LS3 CNC Ported Aluminum Cylinder Head 255cc Ti Ret LSx. 650″ is in sale since Saturday, December 12, 2015. This item is in the category “eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Cylinder Heads & Parts”. The seller is “treperformance” and is located in Costa Mesa, California. This item can be shipped worldwide.
- Part Brand: TFS
- Important Information: Price Listed is PER HEAD
- Interchange Part Number: Intake Runner
- Brand: Trick Flow Specialties
- Country/Region of Manufacture: United States
- Core Charge: None
- Material: Aluminum
- Manufacturer Part Number: TFS-3261T002-C01
- Fitment Type: Performance/Custom