The ultimate in replacement for Chevrolet LS1, LS7 or C5R blocks, World Products’ WARHAWK block is cast from 357-T6 aluminum, the absolute strongest available, and has important improvements that even factory race blocks don’t have. This translates into engine builders being able to obtain more power and enjoy improved reliability with WARHAWK-based engines.

Let’s start at the bottom end. Main caps made of 1045 alloy steel billet are employed. This material is tougher than the 1020 steel used by others. The caps are located by ring dowels and secured with 200,000 psi tensile strength 7/16” ARP main studs and cross-bolts.

It’s important to note that the WARHAWK uses a priority main oiling system, which feeds the crankshaft first and the top-end last. Others feed the top-end first and can starve the main bearings.

Water jackets are redesigned to provide more support around the cylinder – important for big boost applications. They also enhance cooling.

World Products also recognized that in order for engine builders who employ power adders to maintain high combustion pressures with complete reliability it was essential to improve the sealing of the LS. With this in mind World’s engineering team added provisions for the optional use of two extra head studs per cylinder. They are designed to work in concert with the WARHAWK 12° LS7 cylinder heads, which also have the extra bolt holes. Please note that the cast iron GM LSX block and the World Products WARHAWK block do not have identical locations for the extra head bolts, however, standard 4-bolt GM LS heads will fit.

Another way that World has improved upon the quality of its LS block is through the machining process (which is to QS9000 standards). All WARHAWK blocks are CNC machined in only two fixturing positions, which prevents the problems that can occur with production line blocks that are machined in multiple operations and the tolerances stack from one machine to the next. Bottom line, World’s WARHAWK is the most advanced, precision made block on the market for LS applications!

Please Note:
Warhawk blocks require the purchase of a mandatory block kit
Part # 832874 Warhawk Block kit
All the hardware and parts needed in order to bolt on LS heads and manifolds.
Includes the following parts:

Valley Cover Plate (1 pc.) | Camshaft Retainer Plate
Valley Cove Screw | Rear Seal Plate (1 pc.) | Camshaft Retainer Screw

Requires Fel-Pro# P96844 Rear Main Seal Gasket
NOT INCLUDED IN THIS KIT
Requires GM Part# 89060436 Rear Seal
NOT INCLUDED IN THIS KIT

Material: 357-T6 aircraft aluminum alloy
Deck Heights: 9.800 or 9.240"(.600" minimum deck thickness)
Motor Mounts: LS1 and early small block Chevy
Head Studs: Provisions to use 2 extra studs per cylinder (optional)
Bore Sizes: 4.000" and 4.125" (w/.100" dry sleeves & .300" support
Cam Bores: Can be machined up to 60mm
Max Bore Size: 4.155
Stud Holes: Counter bored to eliminate distortion
Components: Accommodates all standard GM LS-series
Oil Systems: Can accommodate dry sump (scavenge p/u at rear)
Crank Clearance: 4.500" stroke
Main Caps: Billet steel C5R-style with 200,000 psi ARP fasteners
Main Cap Design: All 5 Caps are 4 Bolt Design w/ center 3 splayed outer bolts
Main Cap Locators: Stock Register & 2 Ring Dowels at the 2 center studs
Main Cap Hardware: ARP ½” Stud Kit
Rear Main Seal: Two piece SB Chevy
Lubrication: Priority main (feeds crankshaft first and top-end last)
Weight: Approximately 130 lbs. with sleeves