24/10/2026
715HP WGM Stage 1+ to Stage 2 upgrade!
We took this lovely Isle of Man Green G82 RWD M4 from our Stage 1+ (Milltek mid pipe) to full Stage 2.
This upgrade included some expensive Milltek HJS Catted downpipes (very large high quality cats) MMX Ultimate intake kit with turbo elbows.
On top of the power upgrades, we also installed Billet MMX exhaust tunnel brace, MMX oil cooler guard and some Eibach rear springs.
Interestingly, the car produced the same power on the Dyno after the hardware changes (690HP) but with some tweaks (mainly more ignition timing) we saw 715HP with over 700LBFT on ECUTEK Racerom tuning platform. We might have seen slightly more with another run, but unfortunately the Dyno broke 😮. Diagnosed as a board failure, we are currently awaiting a shipment from Australia, which is hindering some higher power tuning at the moment.
We can see massive gains over all OTS maps on the S58 engine, with flex fuel upgrades for upto 800HP on the stock turbos 😮.
WGM Hybrids are also at the ready for Stage 3 set ups.