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® 215 cylinder heads for GM feature refined combustion chambers to retain stock compression ratios, fully CNC-machined and bowl-blended combustion chambers, and 215 CNC-ported intake and 80cc exhaust runners for maximum airflow. GenX® 215 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.

If you're looking for the best value in GM LSX performance, look no further than these Trick Flow® GenX® 220 aluminum cylinder heads with Fast As Cast® runners. These GenX® 220 heads feature all of the same goodies that make our CNC-ported heads so incredible--13.5 degree valve angles, decreased valve shrouding, increased mid-lift airflow, relocated spark plugs, improved rocker arm to valve cover clearance, and a rigid casting design for extreme horsepower applications--but in a more affordable cast version that flows nearly as much air as the CNC-ported heads. The Trick Flow® GenX® 220 performance cylinder heads come with 220cc intake and 80cc exhaust Fast As Cast® runners that duplicate the port shape and profile of fully CNC-ported runners. The result is near CNC-ported power and performance for the same price as ordinary cast cylinder heads. The combustion chambers are 64cc and valve sizes are 2.040 in. intake and 1.575 in. exhaust. Other features include bronze valve guides, ductile iron intake and exhaust valve seat inserts, 1.300 in. dual valve springs, Viton® fluoroelastomer canister-style valve seals, 7 degree machined steel valve locks, and 7 degree titanium retainers. Bare cylinder head castings are also available.

If you're looking for the best value in GM LSX performance, look no further than Trick Flow's GenX® 220 aluminum cylinder heads with Fast As Cast® runners. These GenX® 220 heads feature all of the same goodies that make our CNC-ported heads so incredible--13.5 degree valve angles, decreased valve shrouding, increased mid-lift airflow, relocated spark plugs, improved rocker arm-to-valve cover clearance, and a rigid casting design for extreme horsepower applications--but in a more affordable cast version that flows nearly as much air as the CNC-ported heads. The Trick Flow GenX® 220 performance cylinder heads come with 220cc intake and 80cc exhaust Fast As Cast® runners that duplicate the port shape and profile of full CNC-ported runners. The result is near CNC-ported power and performance for the same price as ordinary cast cylinder heads. The combustion chambers are 65cc and the valve sizes are 2.055 in. intake and 1.575 in. exhaust. Other features include bronze valve guides, ductile iron intake and exhaust valve seat inserts, 1.300 in. dual valve springs, Viton® fluoroelastomer canister-style valve seals, 7 degree machined steel valve locks, and 7 degree titanium retainers. Bare cylinder head castings are also available.

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® 225 cylinder heads for GM feature refined combustion chambers to retain stock compression ratios, fully CNC-machined and bowl-blended combustion chambers, and 225 CNC-ported intake and 80cc exhaust runners for maximum airflow. GenX® 225 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.

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.

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® 245 cylinder heads for GM feature refined combustion chambers to retain stock compression ratios, fully CNC-machined and bowl-blended combustion chambers, and 245 CNC-ported intake and 80cc exhaust runners for maximum airflow. GenX® 245 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.

Trick Flow engineers combined the best features of GM's LS3 and LS7 cylinder heads with their own unique brand of race-winning engineering and technology to create the ultimate square port LS cylinder heads for 4.000 in. and larger bore engines--the GenX 255 cylinder heads for GM LS3s. These heads feature fully CNC competition ported runners with a premium high-resolution surface finish for maximum airflow and performance potential. They have a 12 degree valve angle to increase piston-to-valve clearance and allow for the use of larger camshafts. These Trick Flow® GenX® 255 cylinder heads for GM LS3 are available with standard and 6-bolt per cylinder mounting patterns, as well as with fully assembled or bare castings.