Engines and Components› Engines, Blocks and Components

Chevrolet Performance

Bare Engine Block

$2,955.84

SKU: 12733807

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
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Overview

The Chevrolet Performance 12733807 is a bare engine block for high-performance builds. It is designed as a direct replacement for LQ4 and LQ9 production engines. This cast-iron block offers durability and strength for demanding applications, featuring a production oiling system and 6-bolt iron main bearing caps for crankshaft stability.
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The Chevrolet Performance 12733807 is a robust and reliable foundation for high-performance engine builds. Designed as a direct replacement for LQ4 and LQ9 production engines, this cast-iron block offers the durability and strength needed for demanding applications. Key features include a production cast-iron construction for extreme power demands, a factory-style oiling system for critical component lubrication, and secure 6-bolt iron main bearing caps that provide superior crankshaft stability. With a 4.000" bore and a 9.240" deck height, this block offers flexibility for various piston and rod combinations, making it ideal for performance tuners. This engine block is built for performance and does not support Active Fuel Management, making it a perfect choice for high-output engines. It is engineered to handle over 500 horsepower, positioning it as a go-to option for enthusiasts looking to maximize power without sacrificing reliability. Whether building a street performance car or an all-out race machine, the GM LQ4/LQ9 6.0L Gen III Cast-Iron Bare Engine Block serves as an ultimate foundation.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandChevrolet Performance
Part Number12733807
CategoryEngines and Components

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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