GenX 255 HD and 280 HD Square Port Cylinder Heads are the heavy-duty versions of Trick Flow’ s popular LS3 heads. Available with your choice of 255cc or 280cc intake port volumes, the heads are fitted with Manley Severe Duty stainless steel intake and exhaust valves to handle the additional stress and abuse of big power adder applications. Other features include:

• 12-degree intake and exhaust valve angles

• 6-bolt mounting pattern

• 67cc CNC-profiled combustion chambers

• 87cc CNC Competition Ported exhaust ports

• Trick Flow by PAC Racing. 650 " lift dual valve springs

• Trick-Alloy powdered metal valve guides

• Titanium retainers

• Works with all LS head gasket and engine block combinations

• Accommodates LS3-style intake manifolds and LS9 / LSA blower assemblies

Airfl ow Results GenX 280 HD Square Port

Tests conducted at 28 " of water( pressure). Bore size: 4.125 "; exhaust with 2 1 ⁄ 8 " pipe.

Engineered for Performance! New heads are just one part of the Serious Horsepower formula. To complete it, you’ ll need some more components.

Track Max ® Camshafts

• Dyno proven to significantly increase power

• Made from premium billet steel blanks

• Available in several hydraulic roller designs up to 230 °/ 238 ° duration and. 625 "/. 625 " of lift

Variable Valve Timing Delete Kits

• Removes VVT so your engine makes big power with aftermarket parts

• Available with 1- and 3-bolt Cam gears

• Includes cam / crank timing gears; timing chain and damper; LS2 / LS3 timing cover with bolts, seal, and gasket; cam sensor, harness, and bracket; water pump gaskets; and cam, cam sensor, and balancer bolts

R-Series Intake Manifolds for GM LS3

• Bring carbureted-style aspiration to LS3-style engines

• 3,500-7,500-plus RPM range

• Available in carbureted and carb-style EFI versions

Scan here for more details.

2603DUTF

Some parts are not legal for sale or use in California or other states with similar laws / regulations. Please check your state and / or local laws / regulations.