Holley Fuel Pressure Regulator -- Which one is it?

[joefrantz]

I've got a Holley FPR that I picked up from a used parts dealer.
Is there a way to tell if it is the 1-4 vs 4-9 psi variety?
The only identifying number on it is 34R-6657B directly above the Holley logo. The Holley site doesn't list any data based on this number, and their photo is the same for both pressure ranges.
I assume that the diaphram is the only differentiating factor???.

Thanks for your help.
Joe Frantz

[dhoward]

My box has part number 12-804 on it....

[dhoward]

Oops, jus re-read your post. Guess you don't have a box....
Sorry, mine's mounted and the part number is inaccessable.
Call a local speed shop.

[Steve@Rennsport]

Hi Joe:

What color is it? The internal spring is different between the low & high pressure versions.

[joefrantz]

Hi Steve:
The regulator is painted blue.
It also looks like the re-build kits contain both springs (high & low pressure).
Joe