Does Amsoil make an equivalent for the Fram racing HP 4 and HP 6?

No, because of the high flow rate of those Fram numbers. No, they would supply you the Wix 51222R=HP6 or the 51060R=the HP4.

Automotive Oil FIlters have a bypass valve generally set to around 14-16 psi and Racing FIlters to around 20-22 psi. That is how they get their flow up along with efficient media.

So Amsoil is not into the racing end so it hanles Wix and Donaldson.

FYI:


Clarcor manufactures:

Baldwin
Hastings
Amsoil
Casite

Champion Labs

Bosch
Car and Driver
Deutsch
Mobil 1
STP
SuperTech
K&N

Wix = NAPA


How come we have not been talking much about Baldwin filters? Rex Marine sells them.

FYI....NASCAR has pretty much moved to Wix Racing..

They used to use the "Orange Cans" but had problems.
maybe the new ones are better.?

A number of custom engine builders are still use the Fram HP...anyone here like them?

The new HP a's look real good.

FYI:

Clarcor does NOT manufacturer AMSOIL Ea oil filters. WIS does most of the assembly with media from the Amsoil / Donaldson partnership.

AMSOIL does have an EaO filter with the same dimensions as the 51060R which is WIX's replacement for the HP4. Amsoil does not make any filters with the 1 1/2" threads that the HP6 uses.

The HP4 replacement is the EaO24 and I can get those for $13.15 plus shipping. The 57003R would be $24.95 ea.

http://www.amsoil.com/StoreFront/eao.aspx?zo=1132530

It might be the same dimensions, however, did you check the PSI on it? The filter cross reference doesn't bring up any number, but a Wix.

Like the 51060 and 51060R there is no bypass valve. Most GM filters are like this due to the bypass in the engine instead of the filter. The bypass PSI is mostly irrelevant in all but startup and plugged conditions. The filters will rarely ever push oil past the bypass when running. Hook up a pressure gauge before and after the filter and check the pressure differential yourself. You will find a 4-5PSID in most cases, far from popping even the lower 9PSID bypass valves.