[Bernica]

I can only speak to my car.
It has in-line filters at both supply and return lines mounted under the car below the driver's seat. Then an additional in-line filter under the hood just before entering the carb.

I have a mech pump on the engine that takes the daily work and electric pumps in the trunk that I use to prime things and then only work for reserve or if I lose the mech pump.

Hope that helps...