LS Long-Block Crate Engine Assemblies

LS Long-Block Assemblies

Chevrolet Performance LS3 Long-Block Crate Engine

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QUALITY PARTS.
HIGH-CALIBER BUILD.

Offer Valid 1/1/24 to 12/31/24

$250 rebate^* on the purchase of a Chevrolet Performance Transmission within 180 days of the purchase of any Chevrolet Performance Crate Engine^**. Rebate amount dependent on the package purchased.

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PARTS INTENDED FOR COMPETITION USE ONLY.
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PROPOSITION 65 WARNING.
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Introducing three new LS long blocks

New LS long blocks from Chevrolet Performance offer builders all the performance capabilities of the complete crate engines, but at a lower cost and with fewer components, for those who want to finish off their engine with their own intake manifold and other accessories. Three new long-block assemblies are available:

LS3 (P/N 19434644) — Based on the production LS3 engine, the engine uses L92-style rectangular-port heads to produce 430 hp and 425 lb-ft. with the production intake manifold and other accessories.

LS376/480 (P/N 19434646) — Mixing the LS3 with the race-bred LS Hot Cam (with .525-in. lift) increases output to 495 hp and 473 lb-ft., when used with the production LS3 intake manifold assembly.

LS376/525 (P/N 19434648) — With an even more aggressive camshaft, featuring a tight 110-degree lobe separation angle, the LS376/525 is designed for high-rpm performance, delivering 525 hp at 6200 rpm and 486 lb-ft. at 5200 rpm, when used with the production LS3 intake manifold assembly.

Finish the assembly your way

Each new long-block assembly is delivered without the intake manifold, throttle body, fuel rail, injectors, exhaust manifold, or other accessories. Mix and match the parts to take your LS performance engine to the next level.

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