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SLP Crate Engine Assembly, ZL402 LS2 Aluminum Short Block (Low Compression)
SLP-12413M
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ZL402 LS2 Aluminum Short Block (Low Compression) SLP Crate Engine Assembly
Manufacturer: SLP Performance
Model Detail: Gen IV LS2-based aluminum short block
Application: F-Bodies, Corvettes, GTOs, GM Trucks

Crate-Engine-Assembly, ZL402 LS2 Aluminum Short Block (Low Compression)

The all-new ZL402 Gen IV LS2-based aluminum short block builds on the phenomenal success of our 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.

Although designed primarily for use in late-model F-Bodies, Corvettes and GTOs, the aluminum ZL402 also makes a great choice for most street rods, muscle-cars and trucks. Best of all, it's sold outright, eliminating the shipping hassles and expenses of core returns.

You won't find a higher quality, better value LS2 stroker short block anywhere!

This package is sold only in short-block form, minus manifolds, camshaft, oil pump, and other equipment. The advantage of this approach is it allows you to pick a combination best for you. SLP also sells cylinder heads and camshaft packages, and we'd be happy to recommend the best combination for you.

NOTE: While placing your order, please specify model year that the 402 will be installed in, and what style reluctor wheel is required. SLPs harmonic balancer/under-drive pulley is required for proper installation (or an equivalent pulley that is properly keyed) a stock balancer/pulley will NOT fit.

ZL402 LS2 Aluminum Short Block Includes the following:
  • Built entirely from brand new parts
  • Sold outright, no cores required!
  • GM LS2 aluminum 6.0 liter block
  • 402-CID displacement
  • 4.000 inch Callies 4340 forged steel crankshaft, balanced to rotating assembly
  • 4.000 inch SLP/Manley 2618 forged alloy pistons with -28.5cc dish (includes new rings and full-float pins)
  • 6.125 inch SLP/Manley 4340 forged steel H-beam rods
  • Includes new, factory-installed cam bearings; Clevite rod and main bearings
  • 9:1 compression ratio (nominal; ultimate compression ratio will depend upon heads and gaskets used)
  • Designed for naturally aspirated applications
  • Capable of supporting up to 800+ HP
  • Meticulously assembled by SLP to OEM tolerances and specifications.
  • Includes all necessary accessories for retrofit into a Gen III-equipped vehicle
  • Oil pump, timing chain, camshaft, pans, plates, and covers not included.
  • ZL402 OEM-quality fender badges (pair).


NOTE:
SLP STRONGLY recommends that final assembly and installation be performed by an experienced, professional mechanic. Assembly/installation instructions are neither included nor available with this part.

This item must be prepaid with a certified check or money order.
Please email us for more information and a shipping quote.
All engines are shipped in a Heavy-Duty crate, $100.00 additional charge applies.




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PARTS THAT CAN ENHANCE THE APPLICATION OF PART# 12413M
PART NUM DESCRIPTION PRICE
12225 Cylinder Heads, 1999-2005 LS1/LS6/LS2 SLP/AFR 225cc/65cc $2,548.75
12227 Cylinder-Head-and-Cam Package, 1999-2005 402 CID LS1 600 HP $2,955.55
12505 Installation Kit, 2004-2006 Head-and-Camshaft, 2nd Design Late LS1/LS2 Block $279.95
12506 Installation Kit, 2004-2006 ZL402/Head-and-Camshaft, 2nd Design Late LS1/LS2 Block $599.95
12510 Spacers, Windage Tray, ZL402 Engine (set of 10) $20.55
55001 Oil Pump, 1997-2005 LS1/LS6/LS2 Heavy-Duty $185.35
55003 Timing Chain, 2005-2007 LS2 Double-Roller $126.00