Wet muffler bought for my personal yacht, for the Fischer Panda genset. Ran for less than one hour, and determined the genset was unserviceable. Parting it out (see my other auctions).
This muffler has less than one hour of runtime (no, really!). Cleaned out and ready for your installation.
40mm ~= 1.5" exhaust hose or adapter.
See item details here: https://www.defender.com/product.jsp?path=-1&id=2026578