Extractors generally improve power and economy
Running a larger exhaust system helps also (not to large or itll have the reverse effect)
Not sure how many manufacturers there are making these,best bet look around see whos doin what and importantly the costs
Running a larger exhaust system helps also (not to large or itll have the reverse effect)
Not sure how many manufacturers there are making these,best bet look around see whos doin what and importantly the costs
