How many different kinds of Ko4's are there?
 

Im aware of at least 3 of them. There is the normal Ko4, then the hybrid Ko4-16 and i believe that the Rs4 has special Ko4's.. Where might one get one of these special Ko4's? Most importantly, do these "non-standard" Ko4's need special software, or can you just use normal Ko4 software? TIA

Cheers,

-John-

I'm not sure they all bolt up the same. The TT K04 for example is bigger then a regular K04

The TT K04 would not bolt up to an A4 but it would bolt up to a VW Gti,jetta and
 

beetle. There is the K04-15 and K04-23 that will fit our A4's but you have to get a chip to run the different setups.