Engines, Bare Blocks

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Edelbrock RHS LS Bare Race Blocks

Edelbrock RHS LS bare race blocks are designed to meet the needs of today's high-performance engine builders and racing enthusiasts. They are available in standard and tall deck height combinations and are engineered for maximum clearance around a 4.600 in. stroke crankshaft. With their unique design, Edelbrock engineers were able to minimize windage in the rotating assembly, leading to superior engine lubrication at higher rpm. To make them friendly for existing race applications, these blocks contain both factory and motor plate race mounts for Gen I, II, III, and IV engines. Each LS bare race block receives a CT scan to ensure maximum performance and consistency. Standard features include: * Designed from aircraft-quality A357 T-6 aluminum * Siamese cast bore walls (4.125 in. or 4.165 in. diameter) with press-in cast iron sleeves * Machined with 55mm cam bearing journal * Available in standard (9.240 in.) and tall (9.750 in.) deck heights with beefy deck thicknesses (.500 in. standard/.750 in. tall deck); standard (5.87 in.) and tall (6.38 in.) deck cylinder sleeves are available * 6-head bolt design with full water jacket around cylinder walls; large windows in the valley allow access to an inboard 6th head bolt * Block design includes large front and rear -12AN side feeds for serious dry sump setups * Material for oversized lifters with lifter bosses are designed to clear tie bar-style lifters

Not Yet Reviewed

$6,904.95

Callies Mopar Engine Blocks

Callies Mopar engine blocks are Officially Licensed Mopar products. Together with Energy, Callies will manufactured and distribute cast iron engine blocks and components. All parts manufactured will carry authentic Mopar part numbers and be produced from original Mopar molds, cores, and engineering data. The Mopar blocks are being offered in different bore sizes in finished and RoughBore (RB) versions.

Not Yet Reviewed

$6,039.00

Chevrolet Performance LSX454 Bare Blocks

Delivering the seemingly impossible combination of professional racing-level strength and entry-level affordability, the Chevrolet Performance LSX454 Bowtie bare block is the next revolution in high performance engine building. This durable iron-block casting is based primarily on GM's production LS7 block, but designed with more material in key areas—including thicker deck and bores—to support displacements of 454 cu. in. or more, and unique 6-bolts-per-cylinder-headclamping capability that enables forced-induction and nitrous combinations of greater than 2,000 hp. Because the LSX Bowtie block is based on production LS blocks, all of the LS-Series Gen IV cylinder heads, crankshafts, oil pans, camshafts, and accessories bolt right up to it. There is also a tall-deck version for building even larger engines. Chevrolet Performance delivers the LSX Bowtie block semi-finished, allowing you to finish it to your needs. Whether you're building a "tame" 500-horse street engine for your hot rod or a 1,700 hp turbo engine for an Outlaw drag racer, the LSX Bowtie block is the foundation for an unbeatable combination—at an unbeatable price! LSX454 production block: * 4.185 in. bore * Fully CNC-machined * Deck plate honed * Align-honed main bearings * Deck height 9.240 in. (production) * Billet steel main caps * Includes all hardware * Used in LSX454 crate engine LSX Bowtie block specs and features include: * CNC-machined cast iron block * True priority main oiling * 6-head bolts per cylinder * Standard 4.400 in. bore spacing * Extra-thick Siamese cylinder bores * Semi-finished, machined thicker decks * LS7-style, 6-bolt dowel-located billet main bearing caps * Wet-sump and dry-sump oiling capability * Production-style deep-skirt headbolt holes * Production bolt hole and thread sizes * Maintains production exterior accessory mounting provisions * Front motor plate mounting holes added * Additional material cast around cam bearings for greater strength * 8mm exterior/interior fifth- and sixth-headbolt holes * Standard 0.842 in. lifter bores * Accommodates all LS oil pumps and oil pans * External oil pump feed (rear of block) * Main web bay-to-bay breathing holes to support greater horsepower * Includes unique cam retainer, rear cover and lifter retainers For the advanced LSX competition engine builder, you will fully enjoy the following features of the new LSX Bowtie block: * Front oil feed holes can be plugged/restricted for mechanical flat tappet or mechanical roller lifter applications * Can be machined safely to 9.200 in. deck height * Maximum 4.200" bore at .200 in. minimum wall thickness (naturally aspirated applications) * Head bolt holes can be machined for 1/2 in. studs * Cam bores can be machined to accept 60mm roller bearings * Can be machined for larger diameter lifters and/or 1.060 in. bronze bushings * Front oil feed lines can be plugged and external oil pump and/or aftermarket dry sump systems can be used via oil pump feed at rear of block (may be required with certain large stroke/aluminum rod combinations) * Belt cam drive systems can be accommodated; some machining will be required * Front motor plate can be used for racing chassis applications (Sprint car, drag racing, truck pulling, etc.). * Threaded water plugs can be used for external heaters or coolers * Extra stock for main bearing align-honed * 400 mPa tensile strength iron

Not Yet Reviewed

$5,872.33

Chevrolet Performance LSX Bowtie Engine Blocks

Chevrolet Performance LSX Bowtie engine blocks are designed for the advanced competition engine builder. They feature Siamese cylinder bores and a semi-finished deck height. The blocks can accept a maximum stroke of 4.250 in., a maximum bore of 4.250 in., and can support displacements of 454 cu. in. or more. LSX Bowties feature cast iron construction with an orange powdercoat finish. They accept all Gen III and IV LS-style cylinder heads, crankshafts, camshafts, and other components. Order the model with deck height and other options needed for your application. Additional features and specs include: * Front oil feed lines that can be plugged or restricted for mechanical flat tappet or mechanical lifter applications * Can be safely machined to 9.200 in. deck height * 1054 billet steel 6-bolt main bearing caps * 6-bolt cylinder head bolt pattern * Cam bores that can be machined to accept 60mm roller bearings * Can be machined for larger diameter lifters * External oil pump feed at the rear * Added 7th transmission bolt hole to work with early-style GM transmissions * Can accept a front motor plate for racing use * Threaded freeze plugs that can be used for external heaters or coolers * Windowed main bulkhead

5.0 out of 5 stars ( 1 )

$5,864.99

Chevrolet Performance Bowtie Sportsman Race Blocks

These are the blocks to buy if you want to build a serious street car or if you want to head to the race track! Chevrolet Performance Bowtie Sportsman blocks have been the starting point for countless racing engines. These iron blocks are available in a variety of finish options to build almost any engine combination. Most of these blocks have siamesed cylinder walls and 4-bolt main caps that are secured by Grade 8 bolts. All blocks in this family have a 9.025 in. deck height. The Bowtie Sportsman blocks are a great foundation for your serious street car, circle track, or drag car that makes between 350 and 500 hp.

Not Yet Reviewed

$5,057.99

Callies Mopar Drag Pak Engine Blocks

A good foundation can make your build a success. Callies Mopar Drag Pak engine blocks are Gen III cast aluminum engine blocks officially licensed by Mopar and produced by Callie's sister company, Energy Manufacturing. Start your build with the right "Energy"—a Mopar Drag Pak engine block. Drag Pak block specs: * 9.25 in. deck height * 6.1 timing drive, No VCT solenoid * .937 keyway lifter bushings, require finish hone * 60mm RB cam bore, bearings not included * Delivered with 4.120 in. bores, require finish honing to 4.125 in. * 4140 q/t billet main caps * 4-bolt M1 and M5, 6-bolt M2 to M4 * 1/2 in. head studs available

Not Yet Reviewed

$10,502.00

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