Chevrolet Performance 19417351 GM LS, LSX Bowtie Block, Cast Iron, Bare, 9.26 in. Deck, 3.88 in. Bore, Each

$4,452.78
MSRP: $4,826.87
(You save $374.09 )
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SKU:
GMP19417351
MPN:
19417351
Condition:
New
Weight:
250.00 LBS
Shipping:
Calculated at Checkout

Applies To Continental U.S. orders only

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Delivering the seemingly impossible combination of professional racing-level strength and entry-level affordability, the LSX Bowtie 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 cubic inches or more, and unique six-bolts-per-cylinder-headclamping capability that enables forced-induction and nitrous combinations of greater than 2,000 horsepower.

 

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 horsepower 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 - Standard Deck
- 3.880" finished siamese cylinder bores
- 9.260" semi-finished standard deck height (ready to be decked)
- 4.250" maximum stroke (professional engine builders only!)
- Capable of 364- to 482-cubic-inch displacements
- Orange powder-coated finish
- Accepts all LS and LSX Series heads, cranks, cams, etc.
- Approximate finished weight is 225 pounds

LSX Bowtie Block specs and features include:
- 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

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" 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

Engine Block Material:
Cast iron
Engine Block Style:
Aftermarket
Deck Height:
9.260 in.
Cylinder Bore Diameter:
3.880 in.
Maximum Bore Diameter:
4.250 in.
Cylinder Bore as Shipped:
3.880 in.
Finished Cylinder Bores:
No
Maximum Stroke:
4.250 in.
Main Caps Included:
Yes
Main Cap Material:
Billet steel
Main Bolt Style:
6-bolt
Main Journal Type:
LS mains
Rear Main Seal Style:
1-piece
Main Cap Fasteners Included:
Yes
Main Bearings Included:
No
Engine Block Weight (lbs.):
225 lbs.
Raised Cam Location:
No
Cam Bearings Included:
No
Freeze Plugs Included:
No
Finish:
Orange
Quantity:
Sold individually.
Notes:
Semi-finished block.
Make:
Chevrolet
Engine Family:
Chevy small block Gen III/IV (LS-based engines)