Ultimate Bolt-On Performance

Trick Flow Fast As CastTM Cylinder Heads-
Great Performance at an As-Cast Price!

Not everyone needs the all-out airflow capability of a Trick Flow CNC-ported cylinder head. But you can get plenty of power-building airflow with Trick Flow’s Fast As Cast cylinder heads—and for about the same price as the “other guy’s” standard cast heads.

To create a Fast As Cast cylinder head, our engineers digitize the intake and exhaust runners from a fully CNC-ported Trick Flow cylinder head. Those digitized profiles allow us to make a high-flow cylinder head without costly CNC-porting. That means Trick Flow Fast As Cast cylinder heads outflow any standard cast head available—and even rival some of our competitor’s CNC-ported heads. You get great performance at a very affordable price!

Fast As Cast cylinder heads—yet another innovation that proves Trick Flow does mean Ultimate Bolt-On Performance!

It’s no secret—GM LS engines are the hottest thing to hit the scene since Chevy debuted the first small block back in 1955. Thanks to its compact dimensions, high power output, and lightweight construction, one version or another of this engine series has found its way under the hood of all GM’s hottest production cars since 1997.

4.8L and 5.3L iron block versions of the LS platform (the Vortec) have found their way into millions of GM pickups, vans, and SUVs. Until recently, no one gave these motors a great deal of consideration. But as more and more GM trucks make their way into the boneyards, the “little” LS engines are finding their way back to the street as the power plant of choice for kit cars, hot rods, musclecars, street machines, and sport trucks.

To build serious street power, all that’s needed is a good set of heads—Trick Flow’s new GenX Street Cylinder Heads.

Starting with the track-proven GenX Street/Strip LS head design, Trick Flow engineers refined the combustion chambers to retain the stock compression ratio and work with the smaller bore diameters of the 4.8L, 5.3L, and 5.7L engines. They also modified the chambers to unshroud the valves and increase airflow and swirl. The GenX Street heads are available in three versions:

• Option One features standard cast chambers and our Fast As Cast™ ports that precisely duplicate the port shape and profile of fully CNC-ported heads, and valve seat-to-port bowl blending for better transition from the chambers to the ports.
• Option Two combines the Fast As Cast runners with fully CNC-profiled combustion chambers and bowl blending for improved airflow.
• Option Three features fully CNC-machined and bowl-blended chambers and CNC-ported runners for maximum airflow.

In any configuration, GenX Street cylinder heads outflow and outperform factory LS6 heads.

GenX Street heads are fully assembled and ready to bolt on right out of the box. The components include lightweight stainless steel 2.000″ intake/1.575″ exhaust valves, high lift valve springs, chromemoly steel retainers, ductile iron valve seats, retain the use of all stock sensors and fittings and can accommodate aftermarket roller rocker arms. Bare cylinder head castings are also available.

GenX Street Heads, Assembled
TFS-30500001 Standard chambers, Fast As Cast runners, 205cc intake runners
TFS-30500001-CNC CNC-profiled chambers, Fast As Cast runners, 205cc intake runners
TFS-30500001-C00 Fully CNC-ported chambers and runners, 205cc intake runners