Carter Fuel Pump, flange ID: 40001, M3643 for OMC 155 HP Buick V6 225 PB-V215
Replaces: OMC # 380986; Carter # M3643; GM # 6414989; Sierra # 18-7258; Mallory # 9-35404
Please check the numbers that are stamped on your old fuel pump's flange to see if they match the item you are buying. Please do not buy the pump if they do not match. Email us for assistance.