TTE were developing a compressor for the 3litre, it uses the same compressor as used in the is200, but with a different drive pulley
however due to costs the idea was scrapped, however there are companys within the USA that are also developing a compressor, but initial results are not very good.
most tuners are now going the turbocharged route
the compressor that "is" fitted to the is430.....isnt fitted at all, they cannot get the engine management to run properly with the compressor fitted