[chittychittybangbang]

I would think that nozzles, a new turbo, intercooler, exhaust, and custom chip tuning would be best. You would have to talk to your chip tuner to figure out if it's right for you, for most people the answer is maybe.

 

[chittychittybangbang]

I'm not sure of the benefits on the b4 1z engine. The ALH engine it's definitely in the more advanced upgrade path. MAXRPM, the engine should be a beast when you're done!