Are these 2 filters interchangeable?. I know the w719/5 is listed for older 4 cylinder motors but Mann-Hummel specs these filters as identical (bypass valve, anti-drain back valve, size, etc.). When looking at both filters it appears that the 719/5 has the bypass valve at the entrance of the filter (toward the threaded hole and the 719/30 has it at the back the filter. Also the 719/30 uses the "standard" silicone ring looking anti-drain back valve but the 719/5 doesn't have one. It appears to be some how built into the bypass valve.
The reason I ask is because I normally get the 719/30 filters (1997 ABA motor) built when I ordered filters from ECS the sent me the 719/5. This is the filter they list for MKIII 4 cylinders.
I have searched this website and online for hours and I cannot find an answer.