Originally Posted by Rshane
How dıffıcult would ıt be to upgrade from the 535 to the 575, and any ıdea of the cost?
Quite easy: You replace the intake manifold, install the IC circuit, change pulley/belt and load new software. Around 5K in cost.
Personally I am a big VT1-535 fan, the kit is so simple to install and provides a massive power gain at reasonable cost. Since it is only 4.5PSI, and our SC air intake system is very efficient, heat development is not an issue at all.