SKU: 99093897594

BUGPACK Forged Flanged Crankshaft — Chevy Journal, 4340 Nitrided | VW Type 1 (B4-0002)

Sale price$512.55 Regular price$569.50
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Ships within 48 hours · Estimated delivery Aug 23 - Aug 28

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Description

BUGPACK Forged Flanged Crankshaft — Chevy Journal, 4340 Nitrided | VW Type 1 (B4-0002)BUGPACK forged flanged crankshaft for high horsepower air cooled VW engine builds forged from 4340 chromoly steel with nitrided Type IV main journals and Chevy rod journals. The 6 bolt, 6 pin flange eliminates flywheel to crank movement that costs power and durability at high RPM. Select your stroke from the dropdown. Application High horsepower air cooled VW engine builds requiring a forged crank Builds spec'd for Chevy rod journals (2. 000" small

BUGPACK forged flanged crankshaft for high-horsepower air-cooled VW engine builds — forged from 4340 chromoly steel with nitrided Type-IV main journals and Chevy rod journals. The 6-bolt, 6-pin flange eliminates flywheel-to-crank movement that costs power and durability at high RPM. Select your stroke from the dropdown.

Application

  • High-horsepower air-cooled VW engine builds requiring a forged crank
  • Builds spec'd for Chevy rod journals (2.000" small-block Chevy)
  • Type-IV main journal compatibility
  • Flange-style flywheel mounting (6-bolt, 6-pin)

Why a forged crank

Cast cranks fail at high RPM and high load. A forged 4340 chromoly crank, properly nitrided and balanced, is the foundation for any engine making real power. The Chevy journal allows use of a far wider range of high-end aftermarket rods (Carrillo, Eagle, Manley, Scat, etc.) than the OEM VW journal sizes permit — cost-effective compared to building around custom VW-journal rods.

Stroke options

  • 78mm — B4-0002-5
  • 82mm — B4-0003-1
  • 84mm — B4-0002-6 (big-stroke option)

Specifications

  • Material: 4340 chromoly forged
  • Main journals: Nitrided, Type-IV
  • Rod journals: Chevy (2.000")
  • Flywheel flange: 6-bolt, 6-pin
  • Sold as: Each
  • Weight: ~24 lb (shipping)

About BUGPACK

BUGPACK is EMPI's high-performance engine and chassis line for the air-cooled VW community. The forged crank program targets serious horsepower builds where stock or cast components won't survive.

WARNING: This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm. For more information, go to www.P65Warnings.ca.gov. All parts legal for use on pre-pollution controlled vehicles only.

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: 99093897594

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SDLR
Battle Creek, US
★★★★★ 5
Worked perfectly for a long, cold run!
Color: (001) Black / Black / Reflective, Size: Medium
These worked perfectly! They aren’t the warmest but do the job for long cold runs in Texas. I ran a half marathon in 40 degree weather with these on and they kept me warm. They are a bit smaller in size, similar to what other reviewers have said. But I’m a small woman with small hands so the size medium I ordered were perfect. They were warm enough that I took them off at about mile 6. So overall, I’d definitely recommend for a light coverage, snug fit, glove.
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Reviewed in the United States on December 24, 2025
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Joanne Laskowski
Lowell, US
★★★★★ 5
The product is great. I like it very much.
Color: (001) Black / Black / Reflective, Size: Large
The product is great. I like it very much.
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Reviewed in the United States on July 14, 2025
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Kilee
Massapequa, US
★★★★★ 5
Great buy
Color: (001) Black / Black / Reflective, Size: Medium
I absolutely love these! They fit great, I can use them with my phone and they're comfortable. I wear them for just about everything.
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Reviewed in the United States on February 11, 2026
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JP
Waukegan, US
★★★★★ 4
Decent UA gloves pricey for the quality
Color: (001) Black / Black / Reflective, Size: Large
The thickness isn’t what I thought it would be. They’re ok for warmth as long as it isn’t single digits or in the negatives. They’re durable so far and grip is good. The size and fit are good for smaller to medium sized hands. It is also good for pressing your phone screen.
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Reviewed in the United States on December 2, 2025
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Bee
Lexington, US
★★★★★ 5
Great morning run gloves
Color: (001) Black / Black / Reflective, Size: Large
Absolutely love these gloves and they are perfect for a fall morning run or as an extra layer inside a mitten I have noticed under armour gloves seem to run slightly small but the large fit ne perfect and id consider my hand a little on the smaller side these fit perfectly snug
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Reviewed in the United States on December 3, 2025

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