i had a 450hp mk4 24v vrt so i know where you are coming from. if you want to do an all in one stop build ptuning has a nice kit and has an in house tuner, as well as full blown motorsports. with full blown you can do everything from a base kit, all the way to an 800 hp build all from the same shop.
there is nothing wrong with having hardware from one place, then a tune from somewhere else though. just research everything first
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