These are 21348 and 91348s. Same application but the first is ProSelect and the second is NACAR Select.
The ProSelect has the dome end bypass and looks to me like thinner, more porous media (under 50X magnification).
I can't tell for sure if the NASCAR has the same media as the NAPA Gold, but it appears to me better than the PS and the same or similar as the Gold. The NASCAR Retains the Gold's thread-end bypass, too.
The NASCAR has a strange turbine oil spinner thing under the inlet holes...Gimmick?
The PS element is a little taller with the dome end bypass but seems to have less media overall, although I didn't measure it.
Both look like nitrile ADBVs
The ProSelect has the dome end bypass and looks to me like thinner, more porous media (under 50X magnification).
I can't tell for sure if the NASCAR has the same media as the NAPA Gold, but it appears to me better than the PS and the same or similar as the Gold. The NASCAR Retains the Gold's thread-end bypass, too.
The NASCAR has a strange turbine oil spinner thing under the inlet holes...Gimmick?
The PS element is a little taller with the dome end bypass but seems to have less media overall, although I didn't measure it.
Both look like nitrile ADBVs
