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- USA
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Ships within 48 hours · Estimated delivery Jul 13 - Jul 18
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Description
Fits 1988-1995 GM Truck 4.3/5.0/5.7L 3Pc Performance Under Drive Pulley-1603Install a set of BBK performance underdrive pulleys and see an average of 8 15 additional horsepower over the stock pulleys. Under drive pulleys increase engine output by reducing the draw of the engines accessories by slowing them down and reducing the HP they use. Additional and significant performance improvements can be seen by reducing the weight of the pulley versus the original pulley which is why we recommend the BBK CNC Machined billet
Install a set of BBK performance underdrive pulleys and see an average of 8-15 additional horsepower over the stock pulleys. Under drive pulleys increase engine output by reducing the draw of the engines accessories by slowing them down and reducing the HP they use. Additional and significant performance improvements can be seen by reducing the weight of the pulley versus the original pulley which is why we recommend the BBK CNC Machined billet aluminum pulley kits for maximum horsepower gains. ALL BBK pulley kits are designed as direct bolt on replacements for the current factory pulleys and retain full cooling and charging characteristics. BBK under drive pulley kits are vehicle specific and each kit comes with complete installation instructions. Requires the use of a NEW Serpentine Belt - 6 Rib - 91.5 in.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
4.3 ★★★★★
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Product Reviews
★★★★★ 5
Good calcium and magnesium together
Size: 180 Count (Pack of 1)
Size is easy to take
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Works great
Size: 180 Count (Pack of 1)
Excellent
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Truly Pure
Size: 180 Count (Pack of 1)
It’s often difficult to find a supplement that only contains the supplement of interest. So many supplements on the market have other additives. I appreciate that this supplement only has what I’m looking for.
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Reviewed in the United States on January 7, 2026
★★★★★ 4
Better for Your Body's Health
Size: 180 Count (Pack of 1)
I liked this version because it's natural without a bunch of unnecessary fillers, preservatives, flavorings, colorings, of other additives. Why can't all manufacturers follow the same example as Pure Encapsulations? Putting the customer health first!
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Reviewed in the United States on October 7, 2016
★★★★★ 5
good
Size: 180 Count (Pack of 1)
Great prokduct.
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Reviewed in the United States on February 6, 2026