Stay away from the Typhoon. Unless you spend lots of time into it cleaning it up, you will probably loose power w/ that intake (not only that, there's been cases of bad castings causing coolant leaks). Also, a Trick Flow plenum and a FRPP throtle body together costs under $400 (plenum is $100 and throttle body is around $200). Like I said, intake manifolds are useless until you remove the restriction by porting the heads. And though you won't see geat gains on top, the intake manifold will get you 20hp in the mid range.