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?




my dad has flowmaster on his car, at the right rpm, they make you want to jump out the window