So I've been researching this like a mofo. Thx Mario...
From limited knowledge, ABS retrofit on a track car may not be the best idea. It can go into ice mode or do funny things at speed heading into a corner. Different OEM systems each have their own challenges on the track, even in the cars they were designed for.
Overcoming this (for a track car) requires adjustability and tuning. The Bosch system gives you this capability, but like James said costs in the ballpark of :whoa: ...
Many track guys remove them all together and claim they're faster.
Moral of the story is be careful what you read on the internet and proceed with caution.