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Holley Fuel Pressure Regulators 12-804

Fuel Pressure Regulator, Tumble Polished, 1-4 psi, Universal, Each

Estimated Ship Date: Today Would you rather pick it up? Select Location

Brand: Holley
Manufacturer's Part Number: 12-804
Summit Racing Part Number: HLY-12-804

UPC: 090127020234
Pressure Range (psi): 1-4
Regulator Style: Non-return
Regulator Location: Inline
Boost/Vacuum Reference Port: No
Gauge Port: No
Mounting Bracket Included: Yes
Fittings Included: No
Rebuildable: Yes
Inlet Quantity: One
Inlet Attachment: Female threads
Inlet Size: 3/8 in. NPT
Outlet Quantity: Two
Outlet Attachment: Female threads
Outlet Size: 3/8 in. NPT
Return Fitting Size: 3/8 in. NPT
Regulator Material: Aluminum
Regulator Finish: Polished
Quantity: Sold individually.
In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.

The needle and seat assemblies that are installed in Holley Performance carburetors can sufficiently control fuel pressure up to about 8 psi. If the fuel pump is putting out more than 8 psi, a regulator should be used to keep the fuel pressure within safe limits and avoid the possibility of flooding. Holley manufactures a number of regulators for most any need.

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Most Helpful Reviews Review this Product

16 Customer Reviews for Holley 12-804 - Holley Fuel Pressure Regulators

Average Customer Review

5 Star

(12)

4 Star

(4)

3 Star

(0)

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+See All 16 Reviews

Fuel pressure regulator

Summit RacingSummit Racing Verified Purchase

Product looks nice....one problem it had on its arrival no threads on bottom to put bracket to regulator....had to go out and buy a thread tapper before installation which was a downer.....I missed a very important car show for that reason....did want to send it back would have another show...it works as it should!!!!

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Reviewer: EDDIE from IL

Date: October 04, 2014

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great product

Summit RacingSummit Racing Verified Purchase

worked perfectly, great product ,will turn down to 1 lbs pressure ,just like I needed it to

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Reviewer: RICKY from KY

Date: September 29, 2014

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Holley 12-804 pressure regulator

Summit RacingSummit Racing Verified Purchase

Generally I'm happy but theses are hard to mount in a Corvair engine bay. For this application the 3/8 pipe inlet/outlet require a lot of brass to reduce to something smaller. I also cannot get this down to 3 psi from 8 psi at the inlet. I think the flow rate is too low at idle. I had to cut the circle in the bracket to a slot so I don't have to remove all the brass to remove it. Once installed it looks pretty decent. 2nd car installation; both were a bear with lots of brass and hard steel lines. ...read more

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Reviewer: MICHAEL from CO

Date: September 29, 2014

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Holley low pressure regulator

Summit RacingSummit Racing Verified Purchase

Ideal for specific applications. Good to know this item is stocked.

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Reviewer: ERNEST from Australia

Date: August 11, 2014

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Solved my carb flooding issues.

Summit RacingSummit Racing Verified Purchase

Great looking product that was easy to install. Better yet, it solved the flooding issues with my recently re-built Holley 650 double pumper carb. My new mechanical fuel pump was putting out 6.5 PSI, which was enough to blow by the secondary float valves. I'm told these carbs can only handle 3PSI. I set the regulator at 2-1/2PSI, and NO MORE FLOODING ! ...read more

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Reviewer: JOHN from FL

Date: August 07, 2014

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Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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