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  • Main Journal Type: LS mains
Engine Block Style: Aftermarket
Deck Height (in): 9.240 in.
Cylinder Bore as Shipped: 4.065 in.
Engine Block Material: Cast iron
Engine Block Weight (lbs): 225 lbs.
Main Bolt Style: 6-bolt
Main Caps Included: Yes
Main Cap Material: Billet steel
Main Cap Fasteners Included: Yes
Main Bearings Included: No
Rear Main Seal Style: 1-piece
Finished Cylinder Bores: No
Raised Cam Location: No
Cam Bearings Included: No
Freeze Plugs Included: No
Quantity: Sold individually.
Notes: Fully machined block. 4.25 max stroke.
  • Main Journal Type: LS mains
Engine Block Style: Aftermarket
Deck Height (in): 9.240 in.
Cylinder Bore as Shipped: 4.065 in.
Engine Block Material: Cast iron
Engine Block Weight (lbs): 225 lbs.
Main Bolt Style: 6-bolt
Main Caps Included: Yes
Main Cap Material: Billet steel
Main Cap Fasteners Included: Yes
Main Bearings Included: No
Rear Main Seal Style: 1-piece
Finished Cylinder Bores: No
Raised Cam Location: No
Cam Bearings Included: No
Freeze Plugs Included: No
Quantity: Sold individually.
Notes: Fully machined block. 4.25 max stroke.

376 CI Boost Ready Short Block | Gen III/IV

$5,429.99 $3,999.99
(You save $1,430.00)
SKU:
LSXE.19260095.BB4523
Availability:
In stock
Gift Wrapping:
Options available
Quantity:

Product Description

These Chevrolet Performance LSX Bowtie engine blocks have been designed for the advanced competition engine builder. They feature Siamese cylinder bores and a semi-finished deck height. The Chevrolet Performance LSX Bowtie engine blocks can accept a maximum stroke of 4.250 in., a maximum bore of 4.250 in., and they can support displacements of 454 cu. in. or more. The blocks feature cast iron construction with a powdercoated orange finish. They accept all Gen III and IV LS-style cylinder heads, crankshafts, camshafts, and other components. 

Additional features of the Chevrolet Performance Parts LSX Bowtie engine blocks 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

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