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Xona Rotor 7864, built motor, Pnp heads, +1mm bigger valves, Kelford 272 cams, Cosworth IM. Just swapped the headers, same run conditions, same psi:



No additional lag, just pure power and gains underneath the curve :) Definitely worth the upgrade :)
 

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Nice 1!! Given your set up thats a HUGE pick up just from swapping a from one ELH to another.

I wonder how the MAP header would do when compared to these. It looks like a real nice piece just not alot of data on it.
 

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Thanks for posting User!

We often get asked... 'my setup is so-and-so, how much power will I make?' I try to avoid answering because there is no one size fits all answer. In short, power gain from the headers scale up with power because you're improving the VE of the engine, as well as energy transfer from exhaust port to turbine. So for example (and I'm just throwing numbers around here) a stock STi might make 15-20whp, while a 800whp car may make 60whp.
 

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+1 on highly desirable between function and form on top of quality materials! been through to many cars that had issues with manifold after manifold, was glad to find killer b had been around a while after I got back into an sti and given the community some awesome pieces!
 

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