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[s5pitfire]

I don't know I see a lot of "test pipe is like 8-10hp!" and "cat-back is like another 10hp"

Let's be realistic...
I went from (at different times):
1) cat-back
2) test pipe
3) intake and advance timing 3 degrees

The butt dyno is very hard to judge.. and I only have the sohc mtx, but is a nice torquey little v6. But anyway it felt like it was 90% sound increase (those mods) and 10% power increase. In that my car got pretty damn loud, and at WOT it's loud loud.

But I have a feeling intake+testpipe+cat-back is only about 10 hp to the wheels. Then of course that translates to a little bit more at the crank. Then we all know the intake is like 0.5whp so it's completely negligable. But the more mods you have the more power the intake will add... (say a stock motor with intake vs. a motor with headers and full exhaust

It sure would be nice to throw $600 down for long tube headers for ~10whp (its sohc not dohc, which is claimed around 15-18) but it'd still be "slow" compared to "fast" cars such as STi's, 350z, Evo, etc etc etc.
Downpipe seems like it'd be a nice investment... probably ~8 whp.

And i'm just guessing on these based on how much power I felt was added with my intake and exhaust. I felt as if the test pipe added just as much power as my cat-back did. But it is definitely difficult to tell especially when I installed them like 2 years apart.

It's like, cut the BS and just do a DOHC TT swap and stop fiddling around with something that has very low potential. Or perhaps a 3.5L DOHC swap... which would be much more beneficial than just a 3.0DOHC because I remember reading the 3.5 is around 240hp 230tq (I forget) but that's definitely greater gains (SOHC -> 3.5L, rather than SOHC -> 3.0dohc)

(if I had time and was able to hack my car up (parents bought it for me 3 yrs ago), i'd love to gut the inside so that I just have the front seats, carbon fiber hood, really light wheels, lighter crank pulley and flywheel.... because I know less weight is the same as adding HP... reminds me of that video I saw of a completely gutted late 90's Civic Hatch with a built up K20-A motor running close to 300hp (RSX-S motor with 200hp stock) whooping the **** out of c5 corvettes and even a stock supra turbo)