NO IC is a bad idea...you need a turbo manifold built...do you know what size the turbo is...I'm not familiar /w Volks...but the manifold would have to be built for your engine and for the turbine your going to put in...you would also need downpipe, wastegate, checkvalves...

A/F guage and Boost Gauge is optional, as well as boost controller, turbo timer...

BUT I SUGGEST/HIGHLY RECOMMEND INTERCOOLER AND PIPING...