i have both manifolds. both on c15's one has the full tilt and one has the steed speed. the steed speed is a nicer / better flowing unit. has slightly smaller ports , but due to everything being cnc machined it flows better and you keep some exhaust velocity thru rpm range. that the full tilt wont have . at the end of the day. you can't go wrong with either manifold , both are easy to install. both have a coating to keep your heat in that manifold. an both are going to offer a long trouble free service life.
Did you guys ever do a part 2 on comparing the full tilt manifold to the steed speed manifold for cat 3406e/c15?
i have both manifolds. both on c15's one has the full tilt and one has the steed speed. the steed speed is a nicer / better flowing unit. has slightly smaller ports , but due to everything being cnc machined it flows better and you keep some exhaust velocity thru rpm range. that the full tilt wont have . at the end of the day. you can't go wrong with either manifold , both are easy to install. both have a coating to keep your heat in that manifold. an both are going to offer a long trouble free service life.