Not the biggest and best, but I believe I'll feel the difference, and this won't blow the bank. Tell me what you think.

The materials: A 96 1.6L SOHC Hatch, my wallet and time.

Aim: Make 75HP or more. I chose this number because:
A) I think it's achievable, with most sites stating it's got ~65HP stock (Australian model, D16Y engine)
B) A lot of brand new "sports" hatches coming out here (Australia) boasting about having 75HP. So I'd like to match em or better yet beat em.

I used this: http://www.superhonda.com/tech/begin...rformance.html to estimate gains, taking the lowest possible gain as my best expectations. I think it's weird that a number like 8 or 9HP was picked for estimated gain, but oh well, I've used the same numbers. I know it says not to simply add the numbers together, but that's the reason I picked the lowest possible estimated gain and and I have low hopes for each mod by itself, looking more at the end result (and I'll dyno it for the heck of it, to see what i got in the end).

Heres the plan (in the order I'll do them). It's a bit of a mish-mash of the different plans from that page:

1) New exhaust. 2.25" pipes, straight-thru cannon style muffler (most likely a no-name model, by a company called "Supercat" here in Australia. (What should I make sure with the muffler, other than its at least the same diameter as the pipes, to stop any restriciton?) Estimated gain: 8HP max.

2) 4-2-1 header. Most likely A'Pexi or Greddy (which will be better?). I haven't found any other easily obtainable brands here. Estimated gain: 9HP max.

3) Cold Air Intake (I want cold air, not engine ambient air!) Most likely A'Pexi again (I've heard from a few sources now that they're better than K&N). 2nd choice: K&N CAI. Expected gain: 8HP max.

4) Advance timing (free... Woohoo!) Estimated gain: 1-2HP max.

So total expected gains = 26HP.
65HP + 26HP = 91HP. I've got a whole 16HP gap between 75HP and 91HP... left in there for pessimism. Oh and I'll get it tuned after all the mods too, could add a pony or two.

So, am I being realistic in hoping to reach 75HP? And how realistic about getting 91HP?