My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Gates 21666 Curved Radiator Coolant Hose Upper OE Replacement - 10.4in

(1988-1993 Pontiac LeMans; 1988-1991 Pontiac Optima)

Part of: Gates Lower Radiator Hose Curved Coolant Hose

Other options in this family: Gates 22688 Gates 22080 Gates 22448 Gates 22518 Gates 21532

Manufacturer

Picture for manufacturer Gates

Part Number

21666
6 reviews
Sale Price

$16.00

Estimated ship date Friday, November 20

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Gates 21666 is a curved OE replacement upper radiator coolant hose engineered to deliver reliable coolant flow between the engine and radiator. Built to Gates' exacting standards, this hose matches the original equipment fit and routing for a hassle-free installation.

Key Features:

  • Hose Type: Curved coolant hose — upper radiator position
  • Centerline Length: 10.4 inches
  • Inner Diameter: 1.38 in. x 1.63 in. (variable/stepped)
  • Color/Finish: Black
  • Product Fit: OE replacement — direct drop-in with no modification required
  • Sold: Individually
  • Warranty: Lifetime Gates limited warranty

Gates coolant hoses are manufactured from high-quality EPDM rubber, designed to resist heat, pressure, and electrochemical degradation (ECD) — a common cause of hose failure. The reinforced construction maintains flexibility across a wide temperature range, ensuring long-lasting sealing performance in demanding engine cooling systems.

Products specifications

Fits

1988-1993 Pontiac LeMans; 1988-1991 Pontiac Optima

Centerline Length (in)

10.4

Centerline Length (mm)

264

Contains Spring

No

Inside Diameter 1 (in)

1.375

Inside Diameter 1 (mm)

35

Inside Diameter 2 (in)

1.625

Inside Diameter 2 (mm)

41

Number of Branches

0

Speedy

Exactly what I ordered for the best price and fast, too!

Shipped very quickly and had the best price I could find!

Super group to deal with! Great prices, fast shipping and excellent communication! Who could ask for more! <br><br>Thank you,<br>Jody C.

Fantastic site! Received exactly what I ordered in a very timely manner. Customer service is outstanding, will be doing business again!

best price

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy