Stainless steel impeller and 20% increase in flow!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms When it comes to cooling, Stewart is the final word in high performance pumps. The ultimate in BMW cooling with a limited lifetime warranty!
The MSL thermostat ensures a cooler oil temperature which will result in more stable performance
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
A high performance heat exchanger like this will keep the engine at a more consistent temperature and drop intake temps dramatically.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand:
ES#:
3987599
Mfg#:
8131
In Stock
7% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$749.00
This product was last offered at the strikethrough price on 06-08-2026
Ditch the weak, factory plastic coolant expansion tank and free up space on the hot side of your engine bay!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes! Compatible with factory/aftermarket cold side intakes as well as hot side intakes!
Brand:
ES#:
3647095
Mfg#:
021942TMS13
In Stock
ON SALE!
SAVE 15%
$815.99
This product was last offered at the strikethrough price on 05-02-2026
Featuring an all-aluminum tank and core. Lower engine temperatures mean more power and longer life of engine components!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
The MSL thermostat ensures a cooler oil temperature which will result in more stable performance
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Upgrade to a much more durable connection from your cylinder head to your thermostat! Commonly referred to as a "Mickey Mouse" flange/adapter.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3552811
Mfg#:
024797ECS01
In Stock
ON SALE!
SAVE 25%
$74.99
This product was last offered at the strikethrough price on 05-02-2026
Looks, performance, and reliability - upgrade your cooling system today!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes! Upgrade over the OE achilles heel plastic sides and easily-stripped plastic drain plug.
Keep your BMW's B58 engine cool with CSF's performance aluminum radiator!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For vehicles with the M Sport Package (P337A and/or P7B3A)
VRSF front mount intercooler upgrade for B46/B48/B58 M240i, 340i, 440i, 740i, X3 & X4 F20, F22, F30, F32.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms We Price Match - Give Us A Call or Chat!
Looks, performance, and reliability - upgrade your cooling system today!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes! Upgrade over the OE achilles heel plastic sides and easily-stripped plastic drain plug.
The MSL thermostat ensures a cooler oil temperature which will result in more stable performance
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Reduce oil temperatures with the upgraded billet housing and low-temp thermostat! Allows you to add an oil cooler to your vehicle that didn't have the factory option.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4809843
Mfg#:
008731LA01KT
In Stock
ON SALE!
SAVE 25%
$336.80
This product was last offered at the strikethrough price on 05-02-2026
The MSL thermostat ensures a cooler oil temperature which will result in more stable performance
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Retains OEM fitment with superior looks and durability. Connectors included!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4315269
Mfg#:
006205LA09
In Stock
ON SALE!
SAVE 25%
$194.99
This product was last offered at the strikethrough price on 05-02-2026
Upgrade your cooling system with a bigger, more efficient, radiator, electric fan conversion, water pump, lower-temperature thermostat, and cooling system additives to combat the enemy of performance.
Lifetime Replacement
