hi all ive got a 3 inch down pipe with a decat and it sound poo almost like it rattles from cold as the air rushes down the flexi. Its also got a jr induction kit witch dose add power but it may as well not be there sound wise . And to top it all off there is a rattle sound as i change gear and it pulses as low rpm ! im trying to stick with the s3 but its not making it easy HELP