- Engines & Components
- Engine Blocks
- Chevrolet Performance LSX Series Engine Blocks
Delivering the seemingly impossible combination of professional race-level strength with entry-level affordability, the LSX Bowtie Block is the next revolution in high-performance engine building. This durable iron block is based primarily on GM's production LS7 block but cast with more material in key areas, including a thicker deck and bores, to support 454 cubic inches or more. Unique six-bolts-per-cylinder-head clamping capability permits forced induction and nitrous combinations of greater than 2,000 horsepower.
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Because the LSX Bowtie Block is based on production LS blocks, all LS-Series Gen IV cylinder heads, crankshafts, oil pans, camshafts, and accessories bolt right to it. There's a tall deck version to build larger engines, and Chevrolet Performance even offers the LSX Bowtie Block semi-finished so you can do it your way. Whether building a ''tame'' 500 HP 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!
LSX Bowtie Block Specifications
- CNC-machined cast iron block
- True priority main oiling
- 6-head bolts per cylinder
- Standard 4.400'' 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 head bolt 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-head bolt holes
- Standard 0.842'' 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
- Powdercoated orange For the advanced competition engine builder, the new LSX Bowtie Block also features:
- Front oil feed holes can be plugged/restricted for mechanical flat tappet or mechanical roller lifter applications
- Can be machined safely to 9.200'' deck height
- Maximum 4.200'' bore at .200'' minimum wall thickness (naturally aspirated applications)
- Head bolt holes can be machined for 1/2'' studs
- Cam bores can be machined to accept 60mm roller bearings
- Can be machined for larger diameter lifters and/or 1.060'' 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
JEGS Easy Kits are designed by JEGS professionals so you get all the parts you need!