Other vendors state that the GSS340M is a discontinued pump? Walbro introduced the F20000169 pump to replace the GSS340M in March 2004. The F20000169 is exactly the same pump internally as the GSS340(M) apart from the new smaller offset molded inlet. This new inlet saves Walbro the trouble of machining the ends in order to accept a GM style filter sock. Walbro has priced the  F20000169 slightly higher than the GSS340M. Racetronix will continue to offer the GSS340M by machining pumps in-house while passing the savings along to our customers. Please note the 'M' in GSS340M indicates a machined end. A GSS340 (not machined) is the typical pump used in vehicles such as a Mustang and will not accept the GM style filter sock nor fit a G.M. fuel pump module properly. The GSS340 is a current production pump.