SKU: 2357836110

Swap Block Mock Up Cummins 3.9 4BT Engine Block | GF-EJ-CUMMINS-4BT

Sale price$161.51 Regular price$179.46
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Ships within 48 hours · Estimated delivery Jul 11 - Jul 16

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Description

Swap Block Mock Up Cummins 3.9 4BT Engine Block | GF-EJ-CUMMINS-4BTEngine: Cummins 3. 9 4BT Years: 1989 1998 Our patent pending tab and slot version of the mock up block provides accurate mounting positions of engine accessories and bolt ons. Weighs only 26 lbs This unique design is lightweight and comes disassembled for ease of shipping and storage. Precision formed returns on all weight bearing components and tight tolerance slots create a rigid and accurate representation of the Cummins 4BT 3. 9L engine block

  • Engine: Cummins 3.9 4BT
  • Years: 1989-1998
  • Our patent-pending tab-and-slot version of the mock up block provides accurate mounting positions of engine accessories and bolt-ons.
  • Weighs only 26 lbs
  • This unique design is lightweight and comes disassembled for ease of shipping and storage.
  • Precision formed returns on all weight-bearing components and tight tolerance slots create a rigid and accurate representation of the Cummins 4BT 3.9L engine block compared to bolt-together types.
  • One tool accomplishes accurate placement of a 4BT Cummins engine into the chassis build of your choice.
  • Easily positioned by hand, the days of slinging an engine on a crane in and out of your build are over.
  • It's designed to bolt to your transmission while also permitting the attachment of oil pan, motor mounts, header, front timing cover, oil filter housing, and intake.
  • Save time and money and work more safely.
  • Durable steel construction resists heat from welding, so unlike foam blocks, custom motor mounts can be fabricated right on the block.
  • Comes with hardware for exhaust, motor mounts, bellhousing, oil pan, and timing cover.

NOTE: The 4BT was used in commercial vehicles and industrial applications, so some variations to bolt patterns may be seen.?

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 2357836110

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Victor
Chelsea, US
★★★★★ 1
Too small for the shown size.
Size: XX-Large, Color: Black, Size: XX-Large, Color: Black
I usually would buy XL size but in this case I bought XXL thinking since it's cotton it might shrink. But when I tried the T-shirt it was too small. My older XL sized T-shirt has 2 1/2" larger total shoulder width and 3" wider body width. See attached pictures. Length was also a bit shorter by about 1/2". I will to return it.
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Reviewed in the United States on April 15, 2026
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Pattie B
Dallas, US
★★★★★ 2
Does not match the size
Size: 3X-Large, Color: Blue
Way smaller than the size indicated. Very thin material, almost see- thru.
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Reviewed in the United States on December 5, 2025
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Robert
Fort Morgan, US
★★★★★ 5
Will buy again
Size: XX-Large, Color: White
Very comfortable. Fits as expected,
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Reviewed in the United States on September 15, 2025
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Michelle Kindel
West Palm Beach, US
★★★★★ 5
Nice sweatshirt
Color: White, Size: Small
Really happy with this sweatshirt. The material is soft, warm, and has a nice thickness without feeling bulky—perfect for crisp fall days and layering in winter. The quilted texture and mock neck give it a more polished, upscale look than a regular sweatshirt. Fits true to size, and the color is vibrant and unique. I like the quarter-snap buttons and chest pocket for a little extra style and function. Easy to dress up or down with jeans or boots, and works great for everyday wear or going out. Definitely a solid addition to a fall/winter wardrobe.
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Reviewed in the United States on January 4, 2026
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amber smith
Fort Morgan, US
★★★★★ 5
Get one!
Color: Army Green, Size: X-Large
Really nice! My husband is tall and this is actually long enough for him! He really likes it!
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Reviewed in the United States on April 14, 2026

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