SKU: 67670023594

1683 1961-1990 Chevy GMC and 1971-1982 Corvette C3 C4 305 327 350 3/4" shaft water pump

Sale price$134.10 Regular price$149.00
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Description

1683 1961-1990 Chevy GMC and 1971-1982 Corvette C3 C4 305 327 350 3/4" shaft water pumpCorvette running hot? Flowkooler designed a high flow water pump with a CNC machined billet impeller to increased vane count and a reduced casting to impeller vane clearance to take care of the problem. It achieves greater flow rates, higher head pressure and a more efficient flow. The impeller color is due to Type II Class II military grade surface coating which protects against corrosive fluids. FlowKooler introduced the first hi flow pumps for the

Corvette running hot? Flowkooler designed a high flow water pump with a CNC machined billet impeller to increased vane count and a reduced casting-to-impeller vane clearance to take care of the problem.  It achieves greater flow rates, higher head pressure and a more efficient flow. The impeller color is due to Type II Class II military grade surface coating which protects against corrosive fluids. 

FlowKooler introduced the first hi flow pumps for the inline 6 and continues to improve impeller design. Why is increased flow so important to cooling a hot Small Block Corvette 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
Fan Hub Working Height 5 13/16"
Shaft Diameter 3/4"
Hose Connections: 1st 2nd
Gender F F
Diameter 3/4" 7/8"
Threaded Yes Yes
Other Special Features:
  • 16 blade CNC Machined Aluminum impeller
  • Protected from corrosion with military grade surface coating
  • Impeller blades at right angles to shaft; bi-directional impeller
  • Upper hose inlet contained in square boss 1 1/8" tall
  • 3/4" shaft
  • Alternative Part Numbers 10048921, 12307829, 12458924, 12458925, 12522037, 14105938, 3998205, 6258551
Parts Contained in Box:
Mounting Gaskets, Installation Sheet, FlowKooler Decal
Make Model Year Block CID Liters
chevrolet caprice 68-61 V8 327 5.4L
chevrolet corvette 1980 V8 305 5.0L
chevrolet corvette 82-71 V8 350 5.7L
chevrolet impala 68-61 V8 327 5.4L
chevrolet med/hd series 40 80-73 V8 350 5.7L
chevrolet med/hd series 50 90-73 V8 350 5.7L
chevrolet med/hd series 60 90-73 V8 350 5.7L
chevrolet med/hd series c50 86-80 V8 350 5.7L
chevrolet med/hd series c60 1983 L6 374 6.1L
chevrolet med/hd series c60 1983 V8 366 6.0L
chevrolet med/hd series c60 90-80 V8 350 5.7L
gmc c5000 86-80 V8 350 5.7L
gmc c5000 89-87 All All All
gmc c6000 90-80 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: 67670023594

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john jeffrey elliott
Chelsea, US
★★★★★ 1
TOO SMALL
Size: Medium, Color: Blue
Nice socks, but they are way too small. Says they fit size 6 - 10. I kept 3 ( I wear size 8) and gave 3 to my daughter (size 8.5). We both agreed that they were just too small.
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Reviewed in the United States on May 12, 2026
M
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Mar Gee
New York, US
★★★★★ 5
Style and comfort
Size: Medium, Color: Black
Exactly what I was looking for. Style and sock thickness and comfort.
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Reviewed in the United States on December 14, 2025
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Amazon Customer
Draper, US
★★★★★ 5
Comfortable
Size: Medium, Color: Blue
So comfortable! They stay up perfectly love love love
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Reviewed in the United States on December 7, 2025
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Natalie
San Leandro, US
★★★★★ 5
Great socks
Fit Type: Classic Fit, Color: Gray Assorted, Size: Large
These worked perfectly for my son
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Reviewed in the United States on March 1, 2026
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My2cents
Pawtucket, US
★★★★★ 5
My favorite low socks ever
Fit Type: Classic Fit, Color: Gray Assorted, Size: Large
Under armour adult essential Lite no-show socks are 96% polyester and 4% spandex footwear of imported origin. The polyester content of the socks enables them to hold their shape in a better manner along with having a non-absorbent nature. Additionally, it enables the socks to retain the colour in a better manner. Spandex improves their fit along with helping them last for longer time. The flat fit construction of UA Men's Essential Lite is so designed to conform to foot for superior touch and feel. The material wicks engineered within the fabric dry sweat quickly and keep the feet fresh. The embedded arch support further keeps you going by reducing foot fatigue. The set comes with 6 pairs of socks with pull on closure for the perfect fit. Ultrathin lightweight construction of the socks adds to user comfort by allowing users to conduct physical activity and work out while wearing it. Elastic strength of the socks prevents them from slipping down irrespective of the shoes they are worn with. The socks come in 8-12 men shoe size and 9-12 women shoe size. They can be machine washed and are extremely durable while being cost effective. I ordered the socks based on their colour and design symmetry. So far my socks have been through multiple washes and still look new and user ready. I wear them daily because of their amazing fit and plan to buy more as Christmas gifts.
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Reviewed in the United States on September 14, 2022

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