pic of my morpheus power pipe, has a 6" K&N in the fender. on the prototype we had a 9", but for some reason it didn't want to fit. no big deal, could not feel a difference with the 6" compared to the 9". dynoed 415 rwhp SAE, 425 rwhp STD. the only before numbers i have are 412 rwhp STD with an open 9" cone attached directly to MAF with no heat shield. no track numbers yet, waiting for a somewhat cool night. i am uploading more pics now, very nice jet hot finish. oh and simple green is awesome for cleaning your motor, made it look like brand new.