Cylinder Head Style:Assembled
Cylinder Head Material:Aluminum
Cylinder Head Finish:Natural
Combustion Chamber Volume (cc):70
CNC-Machined Combustion Chamber:Yes
Intake Runner Volume (cc):235cc
Exhaust Runner Volume (cc):80cc
CNC-Machined Intake Runner:Yes
CNC-Machined Exhaust Runner:Yes
Intake Port Shape:Cathedral
Intake Port Location:Standard
Exhaust Port Shape:Oval
Exhaust Port Location:Standard
Intake Valves Included:Yes
Intake Valve Diameter (in):2.080 in.
Exhaust Valves Included:Yes
Exhaust Valve Diameter (in):1.600 in.
Valve Springs Included:Yes
Maximum Valve Lift (in):0.650 in.
Outside Diameter of Outer Spring (in):1.300 in.
Damper Spring Included:No
Number of Springs Per Valve:Dual
Lock Style:7 degree
Valve Stem Seals Included:Yes
Rocker Arm Studs Included:No
Rocker Arms Included:No
Rocker Arm Nuts Included:No
Valve Cover Mounting Style:Centerbolt
Accessory Bolt Holes Drilled:Yes
Intake Valve Angle:13.50
Exhaust Valve Angle:13.50
Valve Guides Included:Yes
Valve Guide Material:Bronze
Valve Seats Machined:Yes
Valve Seat Machine Style:3-angle
Valve Seat Material:Ductile iron
Steam Holes Drilled:No
Oiling Style:Through pushrod
Machined for O-Ring:No
Notes:These cylinder heads are not designed as a stock replacement, they can only be used on LS-based engines with a minimum bore diameter of 4.030 in. Must be used with roller rocker arms.
GM's LS engines are the hottest thing to hit the scene since Chevy debuted the first small block back in 1955. Thanks to compact dimensions, high power output, and lightweight construction, a version of this engine series has found its way under the hood of GM's hottest production vehicles since 1997. These Trick Flow® GenX® 235 cylinder heads for GM feature refined combustion chambers to retain stock compression ratios, fully CNC-machined and bowl-blended combustion chambers, and 235 CNC-ported intake and 80cc exhaust runners for maximum airflow. GenX® 235 Series heads come fully assembled and are ready to bolt on, right out of the box. Components include lightweight stainless steel valves, 1.300 in. diameter high-lift valve springs, titanium retainers, and ductile iron valve seats. In addition, these heads retain the use of all stock sensors and fittings and can accommodate aftermarket roller rocker arms. Bare cylinder head castings are also available.