Crate-Engine-Assembly, “ZL427” LS7 Long-Block, 11.35:1 Compression, w/51016 cam, LS3 Set-up 58 tooth

The all-new ZL427 Gen IV LS7-based aluminum long block builds on the phenomenal success of our original ZL402 long-blocks. This new package uses the same race proven internals as our long-block predecessor but features the all-new LS7 block. Designed primarily for use in any late-model GM LS Car/Truck/SUV, it makes a great choice for most street rods/muscle-cars.

Our ZL427 is built around a new GM LS7 7.0L block, a 4.00" 4340 forged SLP/Manley steel crank, 4.125" 2618 forged SLP/Manley aluminum pistons and 6.125" 4340 forged SLP/Manley H-Beam Rods.

The advantage of this approach is the new ZL427 long-block ships to you already assembled eliminating the guesswork associated with building an engine.

You won't find a higher quality, better value LS7 stroker long block anywhere!

SLP also sells the 427 packages in short block form, please reference web-site for your engine needs.

NOTE: While placing your order, please specify make and model year that the 427 will be installed in. Be sure to order the correct ZL427 engine with the proper style reluctor wheel for your application (reference chart below). SLP's 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.

NOTE: Timing Chain pictured is available separately (not included).

ZL427 LS7 Aluminum Long Block Includes the following:

• Built entirely from brand new parts
• Sold outright, no cores required.
• GM LS7 aluminum block
• 427-CID displacement
• 4.000 SLP/Manley 4340 forged steel crankshaft, balanced to rotating assembly
• 4.125" SLP/Manley 2618 forged alloy pistons
• SLP/Manley 4340 forged steel H-beam rods
• SLP/LS3 Cylinder Heads with .660” lift dual springs
• ARP Cylinder head studs
• GM MLS Head Gaskets
• SLP 51016 Camshaft .591/.600-inch lift 224/228 duration @ 0.50 113° LSA
• SLP 1.85 Ratio Rocker Arms
• SLP Heavy-Duty Oil Pump
• New GM Lifters and Lifter Guides
• SLP Hardened Pushrods
• L92 Pedestals
• LS2 Front Cover
• LS2 Valley Cover
• 11.35:1 compression ratio (nominal)
• 58 Tooth reluctor wheel
• Designed for naturally aspirated applications
• Capable of supporting up to 750 HP
• Meticulously assembled by SLP to OEM tolerances and specifications.
• Pans, plates, and covers not included
• SLP offers a 1 year warranty (workmanship)

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.

Please call (713) 600-8600 for more information and a shipping quote. All engines are shipped in a Heavy-Duty crate, $125.00 additional charge applies.

BEFORE ORDERING PLEASE MAKE SURE OF THE NUMBER OF TEETH ON YOUR RELUCTOR WHEEL