Build serious street power!
Trick Flow® GenX® 205 cylinder heads were designed to build maximum power in 5.7L and smaller bore LS engines, such as the Vortec 4800 and 5300. These engines were factory-installed in millions of GM pickups and SUVs and are becoming the powerplant of choice for kit cars, hot rods, musclecars, and street machines. Features of the Trick Flow® GenX® 205 heads include refined combustion chambers to retain stock compression ratios, fully CNC-machined and bowl-blended combustion chambers, and CNC-ported intake and exhaust runners for maximum airflow. In fact, the GenX® 205 heads outflow and outperform the vaunted factory LS6 heads in every way! These Trick Flow® GenX® 205 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, chromoly steel or 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.