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If it's those 40 horses--and remember it's only 40 for LCI; pre-LCI the delta was 15--then you have some options. The closest you could get to a factory-made 6-speed LCI comp pack would be an LCI 6-speed with a Dinan Stage 1 tune, which was a dealer-installed option sold by BMW. According to the Dinan website, their M6 non-comp test mule came with the factory stated 560hp but measured 618. Rated torque of 500 was exceeded by a measured 576. The stage 1 tune brings these figures to 680 and 644, respectively.
With the exception of the minimally less restrictive exhaust, all of the comp pack's extra horses are from software tuning. It's not as if the comp pack came with the Holley double pumper and the regular was fitted with a single barrel needle valve from a weed whacker. From the horsepower perspective, the two versions differ only in software and not hardware.
Having said this, many M6 owners have found traction to be a far more frequent constraint than power. The ongoing discussions of tires attest to this. Depending on how you want to use the car you can decide where to put the money.
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