Looking to replace My SSM manifolds/ dry tails to stelling headers. Have had some offers of pair of greens and white steroid. IS there a model to avoid? Or a model wich IS The best performer? 6000rpm N/A 509cid engine.

the color generally has to do with the shape of the header such as how far from engine center the pipes are and what if any the down turn is at the collector. for example, some colors indicate they are for stagger engines where one side tilts away from the engine and the other toward the engine so the tail pipes can sneak by. other colors may have the same tilt from center but one is straight back while one tilts down. unfortunately I dont have a list of what the colors mean.

Very little precise info about primary id, primary lenght, collector size. I know The White has 2" primary id.

Keep in mind most stelling headers were built for boats with numbered drives and transmissions and outlets are loacted different then most bravo boats

Have you ever measured The primary lenght of the popullar stellings, green, orange,etc. How much hp you typically hain vs SSM with dry to transom Risers, on 670-700hp 6000rpm engine

I have not measured them, I have seen boats with exhaust holes plugged and tips coming thru quite high or even above a swim platform where someone made stellings off a boat with numbered drives work. I hear primarys are around 34 " long and there about the closest your gonna come to real headers , Smitty

34" primary vs The Ssm, must Be atleast 30hp More. That might give me 1.5 mph More top speed 🧐😭. This hoppy IS so crazy