What was found
LEFT EXHAUST MANIFOLD BROKE LEAVING POWER LOSS AND SMOKE IN COCKPIT. PILOT ASSUMED ENGINE FIRE. PILOT TURNED OFF ELECTRICAL, THEN FUEL WHILE MAKING GRADUAL TURN TO NORTH. PILOT SELECTED AN UNCUT WHEAT FIELD TO LAND WITH NO POWER. THREE-POINT STALL LANDING MADE. GREEN WHEAT GRASS FOULED LANDING GEAR AND PLANE GENTLY OVERTURNED IN TALL WHEAT GRASS. RECOMMEND REPLACEMENT OF EXHAUST WITH STAINLESS STEEL CUSTOM PART WHICH CAME WITH ENGINE. NO SERIAL NUMBERS FOUND OR MANUFACTURER ON THIS EXHAUST OR OTHER UNDAMAGED ONE.