Stainless steel impeller and 20% increase in flow!
When it comes to cooling, Stewart is the final word in high performance pumps. The ultimate in BMW cooling with a limited lifetime warranty!
Brand:
ES#:
2581452
Mfg#:
888010330
In Stock
$219.99
This product was last offered at the strikethrough price on 06-15-2026
Upgrade to a much more durable connection from your cylinder head to your thermostat! Commonly referred to as a "Mickey Mouse" flange/adapter.
10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3552811
Mfg#:
024797ECS01
In Stock
ON SALE!
SAVE 25%
$76.99
This product was last offered at the strikethrough price on 06-13-2026
Looks, performance, and reliability - upgrade your cooling system today!
10X Entries For Our 25th Anniversary Sweepstakes! Upgrade over the OE achilles heel plastic sides and easily-stripped plastic drain plug.
Brand:
ES#:
3023150
Mfg#:
006084ECS01AKT
In Stock
ON SALE!
SAVE 25%
$420.99
This product was last offered at the strikethrough price on 06-13-2026
The last expansion tank you'll ever need! Upgrade to durable aluminum construction and leave failure-prone plastic behind.
10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4876067
Mfg#:
008682LA02
In Stock
ON SALE!
SAVE 20%
$434.99
This product was last offered at the strikethrough price on 06-13-2026
The last expansion tank you'll ever need! Upgrade to durable aluminum construction and leave failure-prone plastic behind.
10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
5425426
Mfg#:
050595LA03
Ships in 9 Business Days
ON SALE!
SAVE 20%
$509.99
This product was last offered at the strikethrough price on 06-13-2026
Featuring an all-aluminum tank and core. Lower engine temperatures mean more power and longer life of engine components!
2X Entries For Our 25th Anniversary Sweepstakes!
The last expansion tank you'll ever need! Upgrade to durable aluminum construction and leave failure-prone plastic behind.
10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
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
Track-tested and street-ready—the ULTIMATE cooling system upgrade for your E46 M3!
10X Entries For Our 25th Anniversary Sweepstakes! 10X Entries For Our Spin To Win Sweepstakes!
Retains OEM fitment with superior looks and durability!
10X Entries For Our 25th Anniversary Sweepstakes! Includes new connectors - don't reuse brittle, high mileage plastic connectors!
Brand:
ES#:
2748020
Mfg#:
003631ECS01
In Stock
ON SALE!
SAVE 25%
$198.99
This product was last offered at the strikethrough price on 06-13-2026
Featuring a high-performance Stewart water pump and low-temp Mishimoto thermostat with aluminum housing!
10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4818358
Mfg#:
11517527799KT
In Stock
$357.99
This product was last offered at the strikethrough price on 06-15-2026
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.
Lifetime Replacement
