What IAT droppers are you referring to? IAT is probably one of the biggest enemies of these cars due to ECU timing pull when it gets a little warm.
And then some weight reduction and iat droppers other than that all the common shit. These cars don't hook up worth shit so when I try to I just put r6s 225/40/17 on Oz's but it gets violent. DSG is a good chunk of it I'm sure as well, most of these cars are manual and makes a big difference