Quote:
Originally Posted by RJ999
Tuners say stock Sti airbox is very good...no need for cai unless you've done front mount and big turbo like looking for big hp big mods. They done lots tests and it only makes like 2-3hp difference on some setups(on some no difference) unless what I said above.
Unless thats just for the 06/07 airbox
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Which tuners say this?
Both WRX & STI airboxes are the same, both use the same snorkus (resonance chamber) and both use the same filter.
What is this big horsepower you speak of? 300? 600? 6000?
Peak power gain is negligible it's more about a straighter intake path for faster on/off boost response.
Most noticeable if you do the silicone intake pipe and CAI at the same time (removing Snorkus, stock airbox and plastic under manifold intake pipe).