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SLP "ZL402" LS1 short block assembly on sale!

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The ZL402 LS2-based aluminum short block builds on the success of SLP's original ZL402 iron short block. This new package uses the same race- proven internals as its iron block predecessor but features the all- new LS2 block for weight savings of over 100 pounds compared to an LQ4/LQ9-based engine.


Although designed primarily for use in late-model F-Bodies and Corvettes, the aluminum ZL402 also makes a great choice for most late-model GTOs, street rods, muscle cars, and trucks. Best of all, it's sold outright, without core charges.



Built entirely from brand-new parts.

Sold outright, no cores required!

402 CID displacement

GM LS2 aluminum 6.0-liter block (includes block plugs)

4.000" Eagle 4340 forged steel crankshaft, balanced to rotating assembly

4.000" Ross 2618 forged alloy pistons with -6.00cc dish (includes new rings and full-float pins)

11:1 compression ratio (nominal; ultimate compression ratio will depend upon heads and gaskets used)

6.125" Eagle H-beam rods

Includes new, factory-installed cam, rod and main bearings.

Comes with everything required to retrofit into an LS1-equipped car or truck

Designed for naturally aspirated use.

Assembled to OEM tolerances and specifications.

Capable of supporting over 600 hp.

Oil pump, camshaft, pans, and plates not included.

ZL402 badges (pair).


Regular price is $3949.99. We are able to offer this for only $3649.99 through April 30th!


12412 Crate-Engine Assembly, "ZL402" LS2 Aluminum Short Block (High Compression)


*This item must be prepaid with a certified check or money order.


Orders can be placed online or by calling 1-877-482-9763.(1-508-636-0770 in MA).




ORDER LINE - 1-877-4-TBYRNE (1-508-636-0770 in MA)

E-MAIL - [email protected]



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