Looking through this months Modified Mustangs magazine I noticed a page from Summit Racing's advertisement spread. "Flowmaster 40 Series 2 chamber mufflers. Add's 15 to 30 horsepower with that cool flowmaster rumble!". Wow! I have TWO of these on my car. So that mean, plus a minimum of 30 horsepower and a maximim of 60 horsepower. How is this type of bogus advertising even legal?