S&S 55mm Performance Manifold for 2017-2021 M8 Models SEATS- BAD DAD TOURING Improve tappet stability in high

Improve tappet stability in high lift and high rpm situations

S&S is offering V-Series engines for 1984-'99 big twins without fuel or ignition systems

53-12829965-75

2017-present

rocker box gaskets

S&S 55mm Performance Manifold for 2017-2021 M8 Models SEATS- BAD DAD TOURING Improve tappet stability in highBig bore engines are all about the flow, more air in and more air out, anything that slows that down, robs horsepower. The factory M8 intake manifold does a decent job in stock form, but starts getting in the way when trapped between 124" and larger cylinders. The stock polymer unit is also less tolerant of the additional heat that a big bore engine can make at full noise. The solution is the new S&S high flow cast aluminum manifold and a must have