I am trying to decide if I want to put a set of headers on my supercharged Elise. Engine is stock other than the BWR supercharger, larger "Green" fuel injectors, and the ECU tune. I currently have the OEM exhaust manifold with a BWR Silent Touch exhaust. I don't want to put the headers on if it will drive me to get another ECU tune. What is everyone's thoughts on doing this mod? Will it force me to get an ECU tune? Is it even worth the hassle to put headers on? I'm only interested in horsepower, not the noise.