SKU: 55571043778

1688CI 1984-1991 SBC Corvette short shaft 3/4" shaft water pump

Sale price$122.35 Regular price$135.95
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Description

1688CI 1984-1991 SBC Corvette short shaft 3/4" shaft water pumpFlowkooler's pump 1688CI for the small block chevy Corvette engine has a 16 blade skip vane impeller that is CNC machined from billet aluminum. An increased vane count and a reduction in the plate impeller clearance achieves greater flow rates, higher head pressure and a more efficient flow than other OEM water pumps. It is then surface coated with a military grade type II Class II anodized finish. FlowKooler introduced the first hi flow pumps and

Flowkooler's pump 1688CI for the small block chevy Corvette engine has a 16 blade skip vane impeller that is CNC machined from billet aluminum.  An increased vane count and a reduction in the plate-impeller clearance achieves greater flow rates, higher head pressure and a more efficient flow than other OEM water pumps.  It is then surface coated with a military grade type II Class II anodized finish. 

FlowKooler introduced the first hi flow pumps and continues to improve impeller design. Why is increased flow so important to cooling a hot small block engine? Because it has been proven time and time again that reducing the cycle time between the heat source and the heat sink creates more opportunities to shed heat and drop engine temperatures.

From 0-3,300 RPM…Nothing Beats a FlowKooler!

General Specifications:
Type of Material of Pump Body Cast Iron
Number of Blades on Impeller 16 CNC Aluminum
Direction of Rotation CW or CCW
Accessory boss 3/8" threaded @ 12 o'clock
Fan Hub Working Height 5 3/4" 
Shaft Diameter 3/4"
Inlet Outside Diameter 1 9/16"
Hose Connections 1st 2nd
Gender F
Diameter 3/4" @ 9 o'clock
Threaded Yes
Other Special Features:
  • 16 blade CNC Machined Aluminum impeller
  • Anodized with a military grade surface coating
  • threaded 3/8" boss at 12 o'clock - this does not pass fluid (unless drilled)
  • Small-block Chevy "short" Corvette applications 3/4" shaft 
  • Shaft extends past the fan hub .465" like the OE
  • Alternative Part Numbers  10048919, 12522035, 14047008, 14069586, 14094538, 19168607
Make Model Year Block CID Liters
CHECKER MARATHON 1982 V8 350 5.7L
CHEVROLET CORVETTE 84-91 V8 350 5.7L
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: 55571043778

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4.8 ★★★★★
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joshua
Boise, US
★★★★★ 5
Great for shed organizing
Size: 4.5", Style: Open, Size: 4.5", Style: Open
We recently upgraded to a conex/shipping container/metal shed and needed a way to organize all of our yard tools. These work great, the weight holds a lot of items, could be a little longer but we were impressed with them holding everything for over a month now and not moving.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 20, 2026
R
Verified Purchase
Rebecca
Charlottesville, US
★★★★★ 5
Great! Worth the money
Size: 4.5", Style: Open
These things are amazing!!!! So strong you can hang a 20ft ladder and they don’t budge at all. Soooo easy to use especially in a metal building/shed
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 10, 2025
G
Verified Purchase
Guitar
Belleville, US
★★★★★ 4
Good product. Know the limits.
Size: 6 Inch, Style: Open
These are very nice. Sure beats drilling holes in your steel. However, 45lb is a stretch. Will easily hold 25lbs. However 35+ is a stretch, especially if your walls shift a little due to be close to a door. Will definitely order more, just important to understand the limits. Thanks.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 21, 2026
V
Verified Purchase
Valhalla Ranch
Draper, US
★★★★★ 5
Finally, a product that meets all of its advertised claims!
It seems to me like this product is always out of stock. Of the ones I have received and been able to use. They work as advertised and hold an incredible amount of weight. It is very easy to put them on and off, but once they are latched down, you could not remove them by hand without bending the hooks I would like to have a few more boxes to use in my steel building.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 13, 2026
A
Verified Purchase
Ashley
Charlottesville, US
★★★★★ 5
Magnet hooks you need!
Size: 4.5", Style: Open
I have been using these all over our shop and helps keep chords, tools and other items off the floor and more organized. I like the ease of the magnet, and it looks like. Built to last. I wish they were not so expensive.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 9, 2026

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