Basically, i replaced all the exahust system, 2" catback, high flow muffler, new extractors. Had the catback done first, drove great. Now, ever since the extractors went on ive noticed a significant reduction in power. My assumption is that ive created too much of a nonrestrictive environment for the exhaust, hence not providing enough back pressure on the engine to deliver the power it used to. Now, solutions? I dont really want to have to change anything more on the exhaust to create more restriction (because that would simply mean all the upgrades were a complete waste of money), but was hoping to maybe use it to my advantage by creating more exhaust perhaps? Any reasonable/cost effective solutions would be great. Thanks James