BMR B58/S58 Billet Coolant Reservoir

You asked, we delivered. Here is our latest innovative release for the B58 / S58 platform!

Lead time is currently 2 week to ship.

The Black Market Race B58 Coolant Reservoir solves multiple problems with the OEM system, including preventing coolant from overflowing onto the front tire causing loss of control. This issue was first brought to our attention by the drivers and builders of the fastest BMW's in the world. We knew we had a solution!

Each reservoir includes a 2 Bar radiator cap, with an overflow line. Optionally kits can include an overflow tank to be located in the trunk. 

Our Coolant reservoirs also include an 1/8th NPT pressure reference port which can be used in combination with most tuning software's to integrate coolant pressure based safeties (Eg head starts to lift, coolant pressure spikes, safety triggers limp mode) 

Our reservoirs are cut out of solid chunks of 6061 aluminum and assembled together with high temp chemical and steam resistant O rings, we pressure test each reservoir to 150psi to guarantee ZERO leaks. 

These reservoirs are 100% Plug and play with OEM coolant lines on the S58/B58 TU (2020+)

What's included:

• X1 Billet Aluminum Coolant Reservoir
• X1 Coolant Level Sensor
• Coolant Level sensor pigtail
• Mounting Brackets
• OEM Coolant Hose adaptor
• 10ft of 1/4 Push connect hose
• Push connect fittings for overflow routing
• Optional Motiv Pressure sensor
•  Optional Coolant Overflow Tank with breather filter and fasteners
• Overflow Tank Drain Valve

*Brackets and fittings may differ from product photos depending on chassis.*