S&S 55mm Performance Manifold for 2017-2021 M8 Models SEATS- BAD DAD TOURING rocker box gaskets

rocker box gaskets

2017-present

Easy installation – Bolt-on parts – no machining

53-12829965-75

S&S 55mm Performance Manifold for 2017-2021 M8 Models SEATS- BAD DAD TOURING rocker box gasketsBig 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