Includes a 74c race thermostat - Featuring a Pierburg pump
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes! For vehicles with plastic thermostat housing
Includes a 74c race thermostat, water pump, and ECS silicone hoses
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes! For vehicles with plastic thermostat housing
Brand:
ES#:
4172081
Mfg#:
11517586925KT16
Ships in 1 day
ON SALE!
$1126.99
This product was last offered at the strikethrough price on 05-02-2026
Includes ECS N54 400W water pump conversion, 74*C thermostat, installation hardware and coolant!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
5425480
Mfg#:
044952LA05KT
In Stock
ON SALE!
SAVE 18%
$599.99
This product was last offered at the strikethrough price on 05-02-2026
New thermostat and spring. Featuring a low temp thermostat - 40 degrees Celsius/ 72 degrees Fahrenheit lower than factory.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
5456347
Mfg#:
008731KT
In Stock
ON SALE!
SAVE 25%
$74.99
This product was last offered at the strikethrough price on 05-02-2026
Retain OEM fitment with superior looks and durability!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4819358
Mfg#:
008645LA01
In Stock
ON SALE!
SAVE 15%
$97.99
This product was last offered at the strikethrough price on 05-02-2026
Includes a 74c race thermostat - Featuring a Genuine BMW pump
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes! For vehicles with plastic thermostat housing
Includes a 74c race thermostat, Pierburg water pump, and ECS silicone hoses
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes! For vehicles with plastic thermostat housing
Brand:
ES#:
4172080
Mfg#:
11517586925KT15
In Stock
ON SALE!
$756.99
This product was last offered at the strikethrough price on 05-02-2026
Includes thermostat with o-ring, and coolant
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
2718469
Mfg#:
11537836155KT1
In Stock
ON SALE!
$104.99
This product was last offered at the strikethrough price on 01-03-2026
Restore proper function to your cooling system
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Brand:
ES#:
2813514
Mfg#:
11537549476
Ships in 1 Business Day
$76.99
This product was last offered at the strikethrough price on 04-07-2026
Includes everything you need to replace your water pump and thermostat. Featuring OE water pump and thermostat.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes! Featuring all German-made components - water pump, Wahler thermostat, Genuine BMW coolant
Brand:
ES#:
2763074
Mfg#:
11517632426KT4
Ships on Oct 14, 2026
$679.99
This product was last offered at the strikethrough price on 12-09-2025
Your thermostat helps regulate engine temperatures by allowing the coolant to circulate through the radiator once it opens. If it fails, this might mean it never closes, but worst case, it could mean your coolant doesn't get to the radiator. Stay ahead of cooling issues by replacing your thermostat regularly with an OEM thermostat or quality aftermarket thermostat from our selection.
Partial Replacement
