CSF 8258 BMW S55 Auxiliary Radiator with Rock Guard – M3, M4 & M2 Competition

Choose a single CSF 8258 auxiliary radiator or a pair for your BMW S55-powered M3, M4 or M2 Competition. Each radiator includes a rock guard and fits either the left or right side.

Choose your quantity

• Single Aux Radiator: Includes one CSF 8258 radiator with rock guard.
• Two Aux Radiators: Includes two CSF 8258 radiators with rock guards, one for each side.

Vehicle fitment

• BMW F80 M3 Sedan (2014–2018)
• BMW F82 M4 Coupe (2014–2020)
• BMW F83 M4 Convertible (2014–2020)
• BMW F87 M2 Competition Coupe (2018–2020)

Compatible with manual and automatic transmissions. Manufacturer: CSF. Manufacturer part number: 8258. Product photos may show two radiators; the quantity supplied depends on the option selected.

The items installed or applied to vehicles are intended strictly for off-road use only and track vehicles. These modifications may not comply with emissions, safety, or environmental regulations required for public road use under Environmental Regulatory Agency (ERA) laws. It is the sole responsibility of the vehicle owner or operator to ensure adherence to all applicable local, state, and federal regulations. Use on public roads may result in legal penalties or vehicle impoundment. Always verify compliance with local authorities before installation.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

If you're unsure whether a part will fit your vehicle, feel free to contact us here with your inquiry. Our helpful sales team will reach out to confirm if it's the right match for you.

We offer a flat-rate shipping fee across the continental United States. This excludes Alaska, Hawaii, and U.S. territories. For international orders, additional shipping costs will apply. Please contact us for a quote if you are outside the continental U.S.

Also, feel free to also contact us at ColoradoN5X@Gmail.Com for any other questions.

Not all items are covered by warranty. Items including warranty, will clearly state that there is warranty within the product description. Most of these items will be a standard 1-year warranty against manufacture defects. You, the customer, will be responsible for shipping and handling. We will fix/replace that item with a product that is in working condition if you meet the warranty criteria. Please note that you will be allowed ONLY 1 claim within the year for that product. ColoradoN5X is not responsible for any damage caused during the installation of our products.