just polish and port your std headers as for equal headers yeah there is more power to be had but you lose the burble and for me thats a big no no

std headers are good for 400bhp easy obviously ported and wrapped though

twin scroll howl > dak dak

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RS Liberty - Because WRX's are only good for parts...

I personally wasn't expecting much of a gain but it appears that the headers I got made the turbo flow alot better. I think the ASG boys were a bit surprised as to how much it opened up too, especially given that they were virtually back to back dyno runs (albeit 0.5bar more boost) but still...

Tomei header kits are a pretty good price these days. Speak to Troy at ProSpeed Racing www.prospeedracing.com.au