Pipe Plug for Exhaust Manifold for Indmar OR PCM
3/4" NPT - Counter Sunk Square Head - Older style
Marine coated steel plug for exhaust manifold outlet
PCM "OLDER" style exhaust manifold drain plug that uses a wrench to remove (non-catalyst systems around 2006 & up).
THIS RS3533 IS STEEL AND WILL DISINTEGRATE OVER TIME.
IT USES A BREAKER BAR OR ½” DRIVE RATCHET.
THIS RS3533A IS BRASS.
IT USES A WRENCH TO REMOVE.
You can use the new style to replace the older, steel style.