25 Hot EFI Crate Motors- The List

Katech LS7 Upgrade 650hp Crate EngineKatech builds engines for nearly every professional race series using Gen III or IV GM engines, as well as street performance engines for daily drivers. The company is known for some killer Gen III/IV crate motors, and accordingly has already jumped on GM's new LS7 and given it some excellent upgrades. Katech says this crate engine makes 600 to 650 or more horsepower depending on options, headers, and induction. Katech also strengthens the GM LS7 engine for higher output durability.

LME 408-inch Pro Long-BlockSpecializing in engines for late model vehicles (as the name would indicate), Late Model Engines can build everything from a "daily driven street dominator to an all-out competition record setter." The company also says it "offers what it takes to make all of your speed fantasies a reality," though I would imagine they don't market precisely what some of us need to carry out those fantasies (I'm talking 36-24-36 here, if you catch my drift).

Lingenfelter 403 CID LS2 Crate EngineOne of the best-recognized names in GM late-model performance, Lingenfelter is well known for its Corvette power packages. This particular 403ci crate engine is rated at 510 hp and 500 lb-ft; keep in mind that the power numbers are with factory Corvette exhaust manifolds and catalysts installed. The additions of headers or high-flow cats would increase power levels

Livernois LS2 404 cid Long-BlockLivernois Motorsports has a 36,000-square-foot facility containing a cylinder head development center and full machine shop, as well as a complete parts store, among other things. The staff also does PCM tuning. Among the company's offerings is this stroked-and-poked LS2. This long-block installed in a 2006 C6 Corvette made 500 horsepower at the rear wheels (560 on a Superflow engine dyno), while being very streetable and retaining stock-type idle and drivability.

Rapid Motorsports 402ci LS2 Dominator Series Long-BlockRapid Motorsports has been building LS-series engines since their release in 1997, and designs and builds everyday streetcars to all-out-wild racecars. Designed for serious street/strip use, this crate engine has produced 553 rear-wheel horsepower on pump gas. Rapid Motorsports uses only high quality components, holds strict machine tolerances, and starts this engine off with a brand-new GM block.