This is the ultimate tune for the Partee Racing High Output Naturally Aspirated BMW S62 engine build (and similarly constructed S62s):? An entire day of on-site or remote dyno tuning with Matt Lambert on our Dynojet 424 XLC.? Starting with a base calibration engineered through years of tuning this and similar BMW S62s, the on-site dyno tuning process provides an in-depth fine calibration of the 'Alpha N' fueling tables, ensures consistently balanced lambda (i.e. AFR) activity, and optimizes fuel delivery for unmatched power output. The result is a finely-tuned, race-ready engine setup that delivers maximum efficiency and control at every throttle position and is as street-friendly as a stock E39 M5.? Pairs with our custom Bosch injectors for the BMW S62.