From: doctorduke_REMOVE_832494_THIS_@yahoo.com
The AC Delco PF454 is a substitute for the OEM PF25 oil filter. This
filter is advantageous because it has an anti-drainback valve, which
will prevent oil from draining back into the sump. This will provide
both more accurate dipstick readings and reduce the time required to
achieve oil pressure on a cold start. The PF25 does not have an
anti-drainback valve.
The PF 454 is also shorter, so it will work with oil cooler adapters
on the filter pad. The PF25 has insufficient steering gear clearance
with most oil cooler adapters.
You can check www.acdelco.com and view comparative pictures that
clearly show the difference in height. The site shows over 75 pages
of applications since it will fit all PF 25 installations, which are
very common. The PF 454 was OEM on the LT1 engines (B, F, and Y body
for example) from the early to late ninties, and it has many other
primary applications.
Duke
P.S. Mike R - you might want to include this as a TB in the next
magazine
[This is message #10179 by user doctorduke on Yahoo! Group Cosworth Vegas: http://groups.yahoo.com/group/cosworthvegas ]