25 Hot EFI Crate Motors --Technical Article -- GM High Tech Performance

Texas Speed 403ci Long-Block

As the name would suggest, these guys are from Texas--and accordingly, they don't mess around. Texas Speed builds LS2s up to 441 ci and LS1s up to 457 ci. Its most popular iron-block stroker is a 410 cid with a 4.045-inch bore and 4.00-inch stroke using a GM 6.0L iron-block, a combo that has produced as much as 640 flywheel horses. The company can also custom build one of these engines specifically for nitrous or boosted applications. "We can build the engine as bare or as complete as you need," says Texas Speed.

TPIS 402ci LS2 Long-Block

TPIS has strived to be a driving force in the high-performance arena for 1985 to present GM performance cars and trucks. TPIS designs and manufactures its own headers, camshafts, intake manifolds, cylinder heads, and suspension components, and offers championship-winning EFI calibrations. "After 40 years in business we have mastered the art of a total engineered engine package. But what we also offer is unmatched drivability and real-world manners. We engineer our parts for real world use which means they work. We also build some of the best racing engines available," says proprietor Myron Cottrell. This LS2 long-block is designed to make 575 hp or more on pump gas, depending on intake used.

Turn Key Engine Supply 510hp LS2 Street Package

Turn Key Engine Supply specializes in complete crate engines to drop into vehicles that never had an LS2, like hot rods, custom off-road machines, and Jeeps. This means they'll also work in non-LS2 performance cars like Third-Generation F-bodies. This particular package is an entry-level street LS2 with a complete ignition system, accessories, fuel system, flywheel or flexplate, exhaust manifolds, you name it--right down to the oil filter. All the customer has to do is hook up five wires, route fuel and coolant lines, and fire it up.