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BMW E90 M3 S65 4.0L

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BMW E90 M3 S65 4.0L Performance Engine Cooling Parts

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E9X M3 Heavy Duty Aluminum Expansion Tank Kit

ES#4876028 - 054921LA02 - E9X M3 Heavy Duty Aluminum Expansion Tank Kit - The last expansion tank you'll ever need! Upgrade to durable aluminum construction and leave failure-prone plastic behind. - Turner Motorsport - BMW

The last expansion tank you'll ever need! Upgrade to durable aluminum construction and leave failure-prone plastic behind. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Turner Motorsport - Corporate Logo
ES#:
4876028
Mfg#:
054921LA02
In Stock
ON SALE! SAVE 15%
$458.99

This product was last offered at the strikethrough price on
06-13-2026

$390.99 USD
Free Shipping

Water Wetter Coolant Additive - 12oz

ES#261427 - 80204 - Water Wetter Coolant Additive - 12oz - Reduces coolant temperatures by as much as 30*F - Redline - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Reduces coolant temperatures by as much as 30*F

Brand:
Redline - Corporate Logo
ES#:
261427
Mfg#:
80204
In Stock
$15.99 USD
Free Shipping
on orders $49 and up

BigPack KIT BMW M3 E90/E92 - Manual

ES#4865936 - BIG-M3-Man - BigPack KIT BMW M3 E90/E92 - Manual - Kit Includes - M3 engine oil cooler - M3 power steering cooler - M3 radiator - DO88 - BMW

Kit Includes - M3 engine oil cooler - M3 power steering cooler - M3 radiator For manual transmissions only!

Brand:
DO88 - Corporate Logo
ES#:
4865936
Mfg#:
BIG-M3-MAN
In Stock
$1972.99

This product was last offered at the strikethrough price on
04-25-2026

$1799.99 USD
Free Shipping
on orders $49 and up

S65 Exact-Fit Silicone Radiator Hoses

ES#4900242 - 008645LA02 - S65 Exact-Fit Silicone Radiator Hoses - Retain OEM fitment with superior looks and durability! Pre-assembled with factory connectors for easy installation. - ECS - BMW

Retain OEM fitment with superior looks and durability! Pre-assembled with factory connectors for easy installation. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
4900242
Mfg#:
008645LA02
In Stock
ON SALE!
$177.99

This product was last offered at the strikethrough price on
06-13-2026

$172.65 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

SuperCool Performance Coolant - Concentrate - 1 Gallon

ES#4338528 - 81205 - SuperCool Performance Coolant - Concentrate - 1 Gallon - Redline's state of the art coolant offering premium performance and protection. Fortified with Waterwetter! - Redline - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Redline's state of the art coolant offering premium performance and protection. Fortified with Waterwetter!

Brand:
Redline - Corporate Logo
ES#:
4338528
Mfg#:
81205
In Stock
$68.99 USD
Free Shipping
on orders $49 and up

SuperCool Performance Coolant - Pre-Mixed - 1 Gallon

ES#4338527 - 81215 - SuperCool Performance Coolant - Pre-Mixed - 1 Gallon - Redline's state of the art coolant offering premium performance and protection. Fortified with Waterwetter! - Redline - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Redline's state of the art coolant offering premium performance and protection. Fortified with Waterwetter!

Brand:
Redline - Corporate Logo
ES#:
4338527
Mfg#:
81215
In Stock
$54.99 USD
Free Shipping
on orders $49 and up

S65 Silicone Radiator Hoses

ES#4819358 - 008645LA01 - S65 Silicone Radiator Hoses - Retain OEM fitment with superior looks and durability! - ECS - BMW

Retain OEM fitment with superior looks and durability! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
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

$83.09 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Mishimoto Liquid Chill Radiator Coolant Additive - 4oz

ES#2764643 - MMRALC - Mishimoto Liquid Chill Radiator Coolant Additive - 4oz - Pairs with all types of coolant to increase heat transfer and decrease engine temps. - Mishimoto - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Pairs with all types of coolant to increase heat transfer and decrease engine temps.

Brand:
Mishimoto - Corporate Logo
ES#:
2764643
Mfg#:
MMRALC
In Stock
$22.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Purple Ice - 12oz

ES#2793046 - 01600 - Purple Ice - 12oz - High performance coolant conditioner - Royal Purple - Audi BMW Volkswagen Mercedes Benz MINI Porsche

High performance coolant conditioner

Brand:
Royal Purple - Corporate Logo
ES#:
2793046
Mfg#:
01600
Ships in 5 Business Days
$12.99 USD
Free Shipping
on orders $49 and up

MMX Engine Oil Cooler

Upgrade your Oil Cooler Today!

Brand:
MMX Performance - Corporate Logo
ES#:
4429930
Mfg#:
MMR17-0201
Special Order: No Guaranteed ETA
$770.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Engine Cooling Parts

Looking to mitigate high temperatures under hard driving or from serious engine upgrades? Our performance cooling system upgrades like radiators, silicone hoses, upgraded water pumps, low-temperature thermostats, electric fan conversions, and more are just what you need to keep those temps down for longer.

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Manufacturer names and/or part numbers are used only for identification purposes.

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