Go Fast Bits Subaru Belt Kit for 2001 Lightweight Engine Pulley (2 Belts Included 5PK836, 4PK850)
SKU: 39640948149

Go Fast Bits Subaru Belt Kit for 2001 Lightweight Engine Pulley (2 Belts Included 5PK836, 4PK850)

Sale price$53.35 Regular price$59.28
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Ships within 48 hours · Estimated delivery Jul 4 - Jul 9

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Description

Go Fast Bits Subaru Belt Kit for 2001 Lightweight Engine Pulley (2 Belts Included 5PK836, 4PK850)GFB lightweight pulley kits are made from aircraft grade 6061 T6 aluminium and offer faster acceleration through significant weight reduction on the crankshaft. Most of our kits are underdriven, which means the accessories are driven slightly slower to reduce parasitic losses. GFB pulley kits are designed to improve acceleration by reducing the rotational mass (inertia) on the crankshaft as well as parasitic loads from the driven accessories. The

GFB lightweight pulley kits are made from aircraft-grade 6061-T6 aluminium and offer faster acceleration through significant weight reduction on the crankshaft.

Most of our kits are underdriven, which means the accessories are driven slightly slower to reduce parasitic losses. GFB pulley kits are designed to improve acceleration by reducing the rotational mass (inertia) on the crankshaft as well as parasitic loads from the driven accessories. The effect is similar to a lighter flywheel, and the engine feels more lively and willing to rev.

We know that people are sometimes concerned about possible adverse effects of lightweight pulleys and underdriving, but rest assured we have done our homework! The underdrive ratios have been optimised to ensure there are NO adverse effects on the performance of the accessories, and whilst it is true that some engine types do suffer harmonic issues from lightweight pulleys, we steer clear of those. The kits we release are thoroughly application tested and do NOT cause engine damage in the short or long term.

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: 39640948149

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Elizabeth E.
Charlottesville, US
★★★★★ 4
Fancy vest
Size: 12, Color: Black
It’s a very nice jacket fits awesome great material and stitching and looks fabulous
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Reviewed in the United States on May 10, 2026
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Georgia
Massapequa, US
★★★★★ 5
Get it!
Size: 10-11, Color: Blue Plaid
Another must buy on my list! Color, size and length were all good. I was a bit surprised as to the thickness of the vest, not heavy, but well made. Definitely value for money!
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Reviewed in the United States on September 17, 2025
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Kindle Customer
West Palm Beach, US
★★★★★ 5
Love it
Size: 14, Color: Black
Fits perfectly
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Reviewed in the United States on September 25, 2025
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PBinAZ
Pawtucket, US
★★★★★ 5
Nice & classy
Size: 10-11, Color: Black
Good fit on my son
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Reviewed in the United States on April 1, 2025
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Kacy Randolph
Omaha, US
★★★★★ 3
Size down.
Size: 16, Color: Black
Fit too large. Nice quality.
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Reviewed in the United States on May 14, 2026

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