Nippy white cup
Aren't we talking peak power tho..maybe the mods haven't helped get a high peak but if it spreads the power out through the rev range then it might not be slower. The Rsport ecu is a good example....hardly adds any power but it much better throught the revs and made a hell of a difference with mine (that was with a shitty piperx filter as well! )
Chris
Chris