Tools› Engine-Related

GForce

LS Swap Block

$309.00

SKU: GF-EJ-LS-DIY

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The GForce GF-EJ-LS-DIY is a lightweight steel LS swap block designed for Gen III and Gen IV LS engines from 1997-2020. Its unique tab-and-slot design allows for accurate mounting positions of engine accessories and bolt-ons. This block comes disassembled and is easily positioned by hand, simplifying engine placement in your build.

Constructed from durable steel, it resists welding heat and can be used to fabricate custom motor mounts. The swap block bolts to your transmission and accommodates the attachment of the oil pan, motor mounts, headers, water pump, and intake, saving time and money while enhancing safety. Mounting hardware for exhaust, motor mounts, bellhousing, oil pan, and water pump are included.
Show original supplier description
The GForce GF-EJ-LS-DIY is the ORIGINAL Lightweight Steel LS Swap Block, engineered for Gen III and Gen IV LS engines produced between 1997 and 2020. This patent-pending mock-up block simplifies engine swap fabrication by providing accurate positioning for drivetrain components and facilitating fitment planning within your chassis build. Its distinctive tab-and-slot design ensures precise alignment for engine accessories and bolt-on parts. It can be easily positioned by hand, eliminating the need for a crane and contributing to a safer working environment. This comprehensive functionality streamlines the mock-up process, saving valuable time and resources. The construction utilizes durable steel, which is resistant to heat from welding. This feature allows for the fabrication of custom motor mounts directly on the block, a significant advantage over foam alternatives. The precision-formed returns and tight tolerance slots create a rigid and accurate representation of the LS engine block, superior to typical bolt-together types. Mounting hardware for exhaust, motor mounts, bellhousing, oil pan, and water pump is included, providing a complete solution for your LS engine mock-up needs.

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

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandGForce
Part NumberGF-EJ-LS-DIY
CategoryTools

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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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