* Late model M3/M4 models have the latest BMW ECU firmware installed at the factory (~March 2019) or may have been subject to a Main Dealer firmware update. This new firmware version removes the loophole that allows direct programming through the OBD port. We are able to simply reverse this to allowing OBD programming, but we do require the car or ECU to be present so we plug in and unlock it (no opening is required). Once completed we can continue to tune remotely as before.
For further upgrading above our Stage 1 upgrade we would recommend fitting our S55 crank hub fix as there have been multiple instances of higher powered cars having the engine timing slip, which puts the car into a limp mode and ultimately stops it from starting.
We offer a couple of options to resolve the problem which we have successfully been applying for a number of years for both customers and other garages that have experienced this issue.
The most straight forward and cost effective solution is to install our Bolt Capture. This CNC and anodised upgrade was developed in-house and stops the crankshaft bolt from loosening over time or under high load. The upgrade only requires 4 hours to install and can be fitted in conjunction with a performance upgrade on the same day.
For more information on this known problem and our options for fixing it, please read our blog post about the issue.
The Remus cat-back exhaust system is also available for the BMW M3 and M4. The Remus system features a carefully designed x-pipe which removes the front silencer along with the secondary cats. The rear silencer includes 2 integrated valves which are controlled by the original servo motors.
The system features a shot-blasted finish along with a choice of four different tail pipes designs.
The price below includes the Racing X-pipe, rear silencer (with stainless trims), fitment and an ECU remap to suit.
Our preferred choice for the BMW M3 / M4 is the gorgeous titanium Akrapovic Evolution exhaust system. This is the system we have installed on our own M4 demonstrator. As well as delivering power gains throughout the rev range, the Evolution system also greatly improves the M3/M4's appearance and sound. A healthy weight loss of around 7 kg over standard helps along with significantly improved exhaust gas flow. The exhaust uses original valve motor system so does not need extra wiring.
The price includes the slip-on system, evolution pipes, tail trims, fitting and ECU remap.
Our Stage 3 options unleashes the full potential of the BMW M3 / M4 turbos and increases power to a reliable 560 bhp and 530 lbft. Stage 3 is designed for off road use only and uses the full de-CAT down pipes to give the maximum back pressure reduction for increased power and response. We offer both our own downpipes and the Akrapovic downpipes which feature a cast V-band collector and welded heat shielding for improved flow, reliability and heat retention.
Both Downpipes are designed to be used with any of the exhausts we offer, own downpipes and a full ECU recalibration will give significant gains and also benefits from a 3 kg weight reduction. Customers looking for more noise and improved performance can also just opt for the downpipes on their own with the original exhaust system. Whilst power levels will drop to around 540 bhp with our Stage 3 remap this represents a very cost effective way to improve both noise and performance.
Please note that this removes all catalytic convertors from your car and should therefore be used for ‘off road’ use only, the car will not be emissions compliant for UK road use