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Rk Tunes
Many in stock
This is our tried and tested tune for an F8x M3/M4. These tunes were designed on...

This is our tried and tested tune for an F8x M3/M4. These tunes were designed on a Dynojet dyno and tested in the real world! A Windows computer is required to utilize the RK-Tunes flash software. Check the FAQ section for windows device recommendations.

Additional Maps or Part Upgrades -  200$
I.e) Adding Port injection/hpfp/lpfp

Port injection tuning (Reflex) included as long as installed before ordering base map if added after tuning a di only base map there will be a charge.

350$ To Schedule Remote Tuning

⦁ Increased target boost pressure
⦁ Top speed governor removed
⦁ Increased Valvetronic valve lift
⦁ Increased RPM rev limit (optional but not suggested)
⦁ VANOS cam timing adjustment
⦁ smoother throttle response
⦁ Ignition timing enhancements
⦁ Air/Fuel Ratio enhancements

⦁ Fuel - Selectable fuel octane rating for your first map (91, 93, E85 blend up to 100% E85 if your fuel system can handle it)
⦁ Rear O2 Sensor desensitization - If you are running aftermarket downpipes please make sure to type so in the modification box O2 Sensor delete.
⦁ Cold Start Delete - All F8x M3/M4s have a cold start calibration to heat up the catalytic converters. If you're unhappy with the way your M3 or M4 idles/runs/sounds while cold please type in into the modification box and we will disable the cold start in your tune. This is highly advised if you are running a cat less exhaust system as the cold start is often very loud.
⦁ Backfire/Burble. This makes your car backfire or burble when you lift off the gas. The aggressiveness can be adjusted depending on what you want. We suggest catless downpipes if you want an aggressive burble / backfire.

60 to 150+ WHP
60 to 150+ WTQ

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We have a 7-day return policy, which means you have 7 days after receiving your item to request a return. There is a 15% restocking fee. For turbos there is a 25% restock fee on canceled or returned orders To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. To start a return, you can contact us at If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted. You can always contact us for any return question at Damages and issues Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right. Exceptions / non-returnable items Certain types of items cannot be returned, custom products (such as special orders or personalized items),. We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item. Unfortunately, we cannot accept returns on sale items or gift cards. Exchanges The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item. Refunds We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

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