LSX Engine Block Standard Deck

Name: LSX Engine Block Standard Deck
Brand: CHEVROLET PERFORMANCE
SKU: 809-19417351
Price: 5309.55 USD
Availability: InStock

^$5,309⁵⁵

Truck Freight

1 left in stock

Ships on Oct 12, 2026

Free shipping

Lowest Price Guarantee

Semi-Finished Engine Blocks

Semi-Finished Deck Height (Ready to be Decked)

Standard Deck
3.880" Finished Siamese Bore
9.260" Semi-Finished Standard Deck Height
4.250" Maximum Stroke
Capable of 364-482cid
Accepts all LS & LSX heads, cranks, cams, etc.
Approximate Finished Weight: 225 lbs

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

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.

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!