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Description
Main Caps Tall Boy Billet IE 4140 (VW 4 CYL)The tall boy VW 4 cylinder main caps are carefully crafted, in house, from USA 4140 alloy steel. They provide extreme rigidity to the main bearing and crankshaft, and a flat foundation for a bedplate or crankshaft girdle installation. These main caps are special because they are designed to work with a crankcase bedplate girdle. Typically, the installation of those products requires machining small spacers, which go between the main cap and the
The tall boy VW 4 cylinder main caps are carefully crafted, in-house, from USA 4140 alloy steel. They provide extreme rigidity to the main bearing and crankshaft, and a flat foundation for a bedplate or crankshaft girdle installation.
These main caps are special because they are designed to work with a crankcase bedplate / girdle. Typically, the installation of those products requires machining small spacers, which go between the main cap and the girdle, bringing it up to the same level as the pan rails. What we found is that these spacers are very difficult to machine to the correct height. Even when done with extreme care, this compromises the installation and results in a warped girdle. Our solution to this is these Tall Boy Main Caps. These stand slightly proud of the pan rail as they come out of the box. They are then machined level with the pan rail, resulting in a perfectly flat surface for the installation of your bedplate / girdle, and the most rigid foundation for your crankshaft possible. In addition, the large profile and high strength material is much stronger and stiffer than the factory main caps.
If you are not using a girdle, please purchase our standard VW 4 Cylinder billet main caps.
Requires machine work including align bore & hone for fitment.
Main journal housing bore size: 2.3228"-2.3236".
These main caps are special because they are designed to work with a crankcase bedplate / girdle. Typically, the installation of those products requires machining small spacers, which go between the main cap and the girdle, bringing it up to the same level as the pan rails. What we found is that these spacers are very difficult to machine to the correct height. Even when done with extreme care, this compromises the installation and results in a warped girdle. Our solution to this is these Tall Boy Main Caps. These stand slightly proud of the pan rail as they come out of the box. They are then machined level with the pan rail, resulting in a perfectly flat surface for the installation of your bedplate / girdle, and the most rigid foundation for your crankshaft possible. In addition, the large profile and high strength material is much stronger and stiffer than the factory main caps.
If you are not using a girdle, please purchase our standard VW 4 Cylinder billet main caps.
Requires machine work including align bore & hone for fitment.
Main journal housing bore size: 2.3228"-2.3236".
About Integrated Engineering: Merging decades of experience with hundreds of hours of prototyping, engineering, dyno testing and daily usage evaluation has output exhaust systems that are the ultimate compliment to your performance car. IE products are proudly engineered, designed, and manufactured in-house, in Salt Lake City USA.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.5 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 5
Nice burrow toy for small to med dog
Style: Popcorn Bucket
We like it! He loves to dig into stuff so this is a perfect addition to his other burrow toys. The most compact and only one hole makes it somewhat challenging for him.
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Reviewed in the United States on April 9, 2026
★★★★★ 5
a fun toy!
Style: Popcorn Bucket
My dog absolutely loves this toy! I have to repeatedly stuff the pieces back inside so he can pull them out. That being said, if you have a heavy chewer this one will bite the dust pretty quick. It’s cute but not sturdy for chewers.
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Reviewed in the United States on January 1, 2026
★★★★★ 5
Perfect for keeping energetic pups busy, mentally stimulated, and happy!
Style: Milk & Cookies
I bought this interactive dog toy to keep my puppy mentally stimulated and it has been a huge hit! At first i was worried she wouldn't understand the concept but once i started squeaking the cookies inside the milk container she couldn't stop poking around until she was able to get all three cookies out. Trying to get the cookies out keeps her entertained but even after she gets them out she loves running around chewing and squeaking on the cookies. The milk container has holes just big enough to make her work a little but not get too frustrated, and the cookies are durable enough for her to keep chewing on without chewing right through them and without her hurting herself on them. Plus cleanup is easy too they wash quickly in warm water. Since the cookies are pretty small they can easily get lost under couches or beds.
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Reviewed in the United States on October 13, 2025
★★★★★ 5
My Cattle dog mix loves these!
Style: Popcorn Bucket
For a hyperactive super smart dog, this popcorn puzzle is a great treat! This is her second and she still plays with her first. I'm going to go ahead and probably buy her some other versions of puzzle toys. This is a good one. Buy it.
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Reviewed in the United States on May 16, 2026
★★★★★ 4
Needs to sell replacement popcorns
Style: Popcorn Bucket
My dog love this toy however, we have 5 popcorn buckets and only two popcorn balls left. It would be great if there was way to just buy the replacement popcorns. I haven't found them anywhere though.
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Reviewed in the United States on July 5, 2025