H2O Performance Water + Oil Cooler Kit for BMW S1000RR K46 (2009–2018)

Engineered to the same standards that H2O Performance applies in professional racing, this combined water and oil cooler kit gives the BMW S1000RR K46 (2009–2018) the thermal headroom it needs to perform at its absolute limit — lap after lap, mile after mile. Where the OEM cooling system was designed around road-going thermal margins, the H2O kit is built for the sustained heat loads that track sessions and high-performance road riding genuinely demand.

Key Features

• Dual-circuit cooling upgrade: combined water and oil radiator kit addresses both coolant and lubricant temperatures simultaneously, protecting the engine from two directions at once
• Race-proven construction used by professional teams worldwide — the same H2O Performance technology trusted on the world's most demanding circuits
• Holds engine oil within its optimal temperature range, preserving film strength and maximising long-term engine reliability
• Significantly reduces the risk of heat-soak, power fade, and thermal shutdown during extended high-speed running
• Precisely tuned as a matched pair — the water and oil radiators are calibrated to work together, not as independent afterthoughts
• Clean, direct fitment for the BMW S1000RR K46 across all model years 2009 to 2018 — no fabrication or adaptation required

Safety Through Thermal Control

The single most reliable way to protect a high-output engine is to keep its temperatures stable and predictable. Overheating is not simply an inconvenience — it degrades oil viscosity, accelerates wear on bearing surfaces, causes power ECU-imposed derating, and in extreme cases leads to seizure. The H2O Performance kit confronts all of these risks directly. By substantially increasing cooling capacity over stock, it keeps both coolant and oil temperatures in the zones where the S1000RR's engineering is calibrated to operate safely. The result is an engine that can be used confidently at full throttle without the thermal anxiety that comes with stock cooling on a hot track day.

Track and Road Applications

Whether the BMW S1000RR K46 is being campaigned on circuit or ridden hard on open roads, the H2O water and oil cooler kit delivers a tangible improvement in thermal stability. On track, this translates to consistent lap times across a full session rather than times that drift as engine temperatures climb. On the road, it provides a meaningful reserve of thermal capacity for spirited mountain passes and motorway touring in warm conditions. Riders who prioritise longevity as much as outright performance will also appreciate that cooler running oil preserves internal clearances and extends service intervals.

Fitment & Compatibility

This H2O Performance water and oil cooler kit is designed exclusively for the BMW S1000RR K46 platform, covering all production years from 2009 through to 2018. It is not compatible with the revised S1000RR introduced from 2019 onwards. Fitment is direct to the K46 chassis without modification.

• BMW S1000RR K46 — 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018

Specifications