⚡ Drive with precision, powered by Holley’s chrome confidence!
The Holley Bypass Regulator delivers precise 6.0 PSI fuel pressure control with durable die-cast aluminum construction and vehicle-specific 3/8” NPT ports. Featuring a boost reference port and a sleek chrome finish, it’s engineered for reliable performance and seamless integration in your fuel system.
| Item Package Dimensions L x W x H | 3.66 x 3.54 x 2.56 inches |
| Package Weight | 0.31 Kilograms |
| Item Weight | 8 ounces |
| Brand Name | Holley |
| Warranty Description | Warranty |
| Model Name | Holley Bypass Regulator, Fuel Pressure 6.0 Psi, Chrome |
| Color | Chrome |
| Material | Plastic |
| Suggested Users | unisex-adult |
| Number of Items | 1 |
| Manufacturer | Holley |
| Part Number | HOL 12-881 |
| Included Components | Holley Bypass Regulator, Fuel Pressure 6.0 Psi, Chrome |
| Size | No Size |
A**O
Great
Works great lowering the pressure of the oem fuel injection pump to 6 psi for my holley carburator.
D**G
Works great
As Described works exactly as designed.
M**E
Perfect for my build
Changing from Fuel injection to a carb set up ,Holley has a great reputation and I wanted the best quality. I added a gauge so I can adjust easily. Remember to use liquid Teflon when installing fitting to prevent leaksBeautiful appearance as well
L**G
Good Product
The regulator is light and so far works as stated. I had the two mounting missing. This was a problem but not a fault of the regulator. It works good.
J**L
could not get the fuel pressure to go less than 14lbs
I have a high pressure fuel pump used for Holley Sniper EFI. I converted back to a 750cfm carburetor, so I purchased this regulator part #12-881 (4.5-9lb), but with the pump running it will not adjust to go below 14lbs. Cannot use.
B**A
worked fine
lowered presure enough
C**R
Great fix for the CJ5!
I have a CJ5 with a 304 AMC motor and went thru 4 fuel pumps and they all over pressure the carb, so I finally installed this regulator and ran a return line and worked perfect!
K**R
Works as advertised.
I initially thought it was junk, couldn't get the pressure down below 12psi. After messing around with it, I discovered that my return line was too small. Disconnecting the return and putting it straight into a gallon jug, I found I could adjust the regulator to 6 psi like I needed. Now I need to replace my 1/4" return with a 3/8."
Trustpilot
1 week ago
4 days ago
