WTK STi Exhaust

[EVO III Monster]

how come the 05 STi dont rumble like the older model onez?

[VexXx Dogg]

Has to do with the exhaust manifold design for efficiency.
Older sti's and recent WRX's came with a single scroll setup with an unequal length manifold.
Your STI has equal length manifold and a twinscroll turbo. It does not rumble like the older scoobys, but it sounds awesome with a proper exhaust.

[EVO III Monster]

ok thanks
so if i get the unequal length headers i would get the rumble then.

i installed a full 3.5 inch stainless steel exhaust already but i wha the rumble..lol

[VexXx Dogg]

It wont work properly and you will lose a lot of performance!
Talk to barry, he can give you some options, but I thought you wanna leave this one stock

[Jimbo]

RICE lol!

[tardissubie]

Has to do with the exhaust manifold design for efficiency.
Older sti's and recent WRX's came with a single scroll setup with an unequal length manifold.
Your STI has equal length manifold and a twinscroll turbo. It does not rumble like the older scoobys, but it sounds awesome with a proper exhaust.

Correct! I recall seeing a legacy switching to a single scroll setup from a twinscroll but I very much doubt you want to do that with your STi just to rumble...