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Trick Flow® GenX® 255 Cylinder Heads for GM LS3

Trick Flow® GenX® 255 Cylinder Heads for GM LS3

Trick Flow engineers combined the best features of factory GM LS3 and LS7 cylinder heads with Trick Flow’s own unique brand of race-winning engineering and technology to create the ultimate square port LS cylinder head for 4.000" and larger bore engines—the 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.

Part Numbers

 Results 1 - 6 of 6 

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Cylinder Head, GenX® 255, CNC Competition Ported, Assembled, 69cc CNC Chambers, 370 Lb. Springs, GM LS3, Each
Cylinder Head, GenX® 255, CNC Competition Ported, Assembled, 69cc CNC Chambers, 448 Lb. Springs, GM LS3, Each
Cylinder Head, GenX® 255, CNC Comp Port, Assembled, 69cc CNC Chamber, 370 Lb. Springs, Ti Retain, GM LS3, Each
Cylinder Head, GenX® 255, CNC Comp Port, Assembled, 69cc CNC Chamber, 448 Lb. Springs, Ti Retain, GM LS3, Each
Cylinder Head, GenX® 255, CNC Comp Port, Assy, 69cc CNC Chamber, 370 Springs, Ti Retain, 6-Bolt, GM LS3, Each
Cylinder Head, GenX® 255, CNC Comp Port, Assy, 69cc CNC Chamber, 448 Springs, Ti Retain, 6-Bolt, GM LS3, Each