4LT GS Roadster
MODIFYING AN LT1 Corvette for improved performance can be a trying business. Aftermarket parts are scarce, the work itself is often maddeningly difficult, and even the most intrepid Corvette tuners may be inclined to treat you like an end-stage Ebola victim. Given these hurdles, we were pleasantly surprised to learn of Trick Flow Specialties' new Fast as Cast GenX LT1 top-end kit, which should be available by the time you read this.
Carrying PN TFS-K304-430-400, the package generates a claimed 430 horses and 400 lb-ft of torque when installed on a healthy, stock-displacement LT1 engine. If accurate, those figures would put a '92-'96 Vette's output on par with Bowling Green's latest, and restore much sorely needed performance credibility to the aging Gen II small-block. We'll be installing the full kit on our '96 C4 coupe in the weeks ahead, but for now, let's take a closer look at the package's specifics.
Heads TFS has offered GenX LT1 cylinder heads for a few years now, but the company's first effort employed largish 195cc intake ports and was intended for stroked or forced-induction engines. The new Fast as Cast version relies on a downsized, 185cc port that makes it ideally suited to naturally aspirated, stock-cube combinations. As the name implies, these heads are designed to offer superb flow right off the shelf, eliminating the need for costly and time-consuming port work...
To Top It All Off - Vette Tech
