I think you're right.
Intake and exhaust should get you to 295-300ish.
Intake spacer gets you solidly over 300, maybe 305-310 if you're lucky.
TB and spacer seems to get you another 5-7 at the wheel.
And the tune after all this should get you close to if not solidly over 320 rwhp, depending on the quality and aggressiveness of the tune.

UDPs are debatable as to what they add versus reliability issues they seemingly bring forth. I still haven't figured that out.

And the jury's still out on the benefits of the electric water pump. Some say it adds less than 5HP, some have installed it and got nothing on the dyno, others have said it added 10rwhp. That's pretty much all over the chart, and for $421.39 from Summit, that's pretty expensive horsepower...[:@]

 

I would think that a Kenne Bell would net you more that 400 hp at the wheels. [&:]
Maybe I'm thinking of something else, but you'retalking about 200 hp over stock to net 400 at the wheels. With supporting mods (injectors, MAF, CAI, full exhaust, etc.) I would think that's very doable, eh?

 

I won't have a built motor and im not looking to go too much over 400hp on the stock one. KB makes good power ya, but im not trying to blow up my motor.

 

i didnt see anyone through out real dyno numbers sooo...


if you got a mach, and wanted some quick bolt on power. Full bassani, and CAI.

Im at 291rwhp/311rwtq.

other than that, parts are expensive and few/far between. Most mods are still for the 2V SOHC Gt's