Miata NA/NB Intake and Exhaust Port Blockoff Plates
When working on your engine with the intake manifold or exhaust manifold removed the last thing you'd want is for junk to fall into the ports and get into the engine! Its common to tape over or stick rags into the ports. These CNC cut aluminum blockoff plates bolt in-place of the manifolds and block the ports securely and more reliably that the other methods. They are also handy for when you want to power wash your engine and not worry about water getting inside the ports; just make sure to put an old gasket under the plates. Perfect for the professional or amateur engine builder and mechanic. As always, parts are made by us, in house, in the USA!
The kit includes a blockoff for the intake and the exhaust ports for and 1.8L NA or NB Mazda Miata. Each is split into two parts for easier storage. The blockoff plates slide right onto the mounting studs in the head of the engine. Since the block-off plates are thinner then the manifold flanges which normally bolt to the head, we include plastic spacers which account for the unthreaded shoulder of the studs and allow you to bolt the block-off plates on using your normal manifold nuts.