I think everyone is confused in this thread
OP wants a setup where he gets between 400-500 hp, however, he wrote it 4-500 as in 4-5 hundred, but most people saw that as he wants 4 to 500 hp (big range). People started making jokes about exhausts will give you 4, FI will give you 500.
What he wants to kno (i thinK)
1. what is better exhaust set up for force induction?
2. is 4 tips better than 2?
no
3. What kind of things will get him in the 400-500 range?
any type of forced induction will get you there