Besides just downloading the manual oh, I'm looking over some things. One item auraria I should say is for the exhaust cutout. My engine requires a stepped header. Start starts at what you which primaries 10 by 15 to 17 and 1/2 in its steps up to 2 1/8". Yeah he gave me specifics on The collector size which has to be 4 inches and a certain length which also includes a side pipe length. not with that all said I'm having a feeling I might have to cut more into the fiberglass to get these pipes out. Am I correct to say that?