Holley 12-804 Chrome Carbureted Fuel Pressure Regulator
Key features
- •3/8" pipe thread ports
- •7/32" restriction
- •Pressure ranges from 1 to 4 PSI
- •Includes mounting bracket
- •Satin finish
Holley 12-804 Chrome Carbureted Fuel Pressure Regulator
List Price: $80.43$72.39DEALYou Save: $8.04 (10%)
Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 22, 2026In Stock (25)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection
Customer Reviews
Reviews sourced from verified Amazon purchasers4.1
out of 5
Based on 10 reviews
5★
70%
4★
30%
3★
0%
2★
0%
1★
0%
Works, don't use a liquid filled gauge in an engine compartment!
apophasis•September 2, 2017
I had a chrome dial regulator, which leaked gas everywhere but luckily didn't actually burn down my ride. Then I got this good one, to try to get 1.5 PSI to the Kadrons. At first it seemed fine, set it to 1.5 PSI and away we go. Got a gauge on the FPR to monitor, and at first it was great. Later, every time I checked it, I'd get a different pressure...
[Edit to update: This FPR didn't fail after all! What happened was that I was using a liquid filled pressure gauge, mounted in the engine compartment. It got hot, and gave a wrong reading. Got a regular non-liquid filled gauge, and it's great. Regulator was fine all along.]
[Edit to update: This FPR didn't fail after all! What happened was that I was using a liquid filled pressure gauge, mounted in the engine compartment. It got hot, and gave a wrong reading. Got a regular non-liquid filled gauge, and it's great. Regulator was fine all along.]
I love this guy!
William J Bass•February 7, 2017
This little guy cleared up fuel issues with an aftermarket carburetor on a Willys Jeep. I was able to dial down the 7psi fuel pump to 2 psi and tune the carb correctly.
Once I got the fuel pressure confirmed, I removed the gauge (sold separately) and installed 3/8"-18 NPT Industrial Magnetic Drain Plug (Internal Head) IP-03 on the second outlet port.
Adding 3/8" Stainless Steel (316) Mini Ball Valve - FxM NPT to the inlet allowed me to use a fuel shut off.
The 3/8" inlets were problematic for my application (1/8" on the vehicle) but I found the fittings I needed on Grainger's site.
Once I got the fuel pressure confirmed, I removed the gauge (sold separately) and installed 3/8"-18 NPT Industrial Magnetic Drain Plug (Internal Head) IP-03 on the second outlet port.
Adding 3/8" Stainless Steel (316) Mini Ball Valve - FxM NPT to the inlet allowed me to use a fuel shut off.
The 3/8" inlets were problematic for my application (1/8" on the vehicle) but I found the fittings I needed on Grainger's site.
High-quality American made unit is easily adjustable and holds precise output pressure over a wide ...
Alan Thomas•July 25, 2016
High-quality American made unit is easily adjustable and holds precise output pressure over a wide range. Use this unit for output pressures 1-4 psi. Was less than $32, fast delivery, came w mtg bracket & screws for mtg inside fenderwell. Beautiful chrome finish, two output ports available. I mounted 0-15 psi gauge to second port.
Buy fittings if you need them as none are included ...
Andrew•April 11, 2016
Buy fittings if you need them as none are included. 3/8 pipe thread to whatever size hose barb you need.. The instructions also said it was supposed to come with a gasket that goes between the regulator and the bracket probably to absorb vibration. It did not include any sort of gasket for this purpose. Still I made it work and I trust this regulator to keep a constant pressure over the cheaper ones available.. I have it coupled to an edelbrock gauge and seems to be working well so far.
Good quality. Difficult to mount.
Laryh•December 20, 2015
Works exactly as advertised. Installation was made more complicated by the absence of a port for a pressure gauge, which means adding an additional fitting somewhere between the regulator and the carb to mount a gauge. One would think that a gauge port would have been easy enough to add to this thing. The housing is not tapped for the mounting screws. I was not able to get the supplied, self tapping, mounting screws to work and had to tap out the holes by hand in order to mount it. Kinda' disappointing.
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