🔧 Holley Carbureted By-Pass Regulator, Shiny - Optimize Fuel Delivery for Peak Performance Review

The product arrived with a damaged inlet thread. When installing the fittings, I cleaned off dirt and applied thread sealant. No leaks yet!

Easy to install, definitely the go-to when you need to hook up a fuel return. I used this on an '88 Chevy truck when converting a TBI to a carburetor. Easy to set up, no problem.

is fully adjustable, we have a high pressure pump in the tank and need a regulator for the carburettor. With the fuel pressure gauge, we got it down to 6.5 pounds and it keeps the fuel pressure right where we set it.

this one is defective in that it will not regulate the pressure below 12 pounds. Turned the key and immediately severely flooded the carburetor. will recover in place rather than return. Very disappointing, this unit was clearly not quality checked and cost me extra time

I put a 280ZX engine on my 240Z and the new engine didn't match the original mechanical fuel pump so I had to fit an electric fuel pump. The electric pump puts out way too much PSI to the carb, so I needed a regulator to be able to control the PSI of the fuel going to the carb. This controller works great. Highly recommended.

The quality sucks for such a price. The inlet and outlet threads were a complete mess about halfway, and the 3/8" brass fittings I got (which appear to be decent quality) don't screw in more than halfway. I doubt it actually regulates pressure well and no mount was included. I'm pretty sure it's some kind of cheap Chinese knockoff with holly on the side that you can usually get for less than $20. I plan to return mine immediately. Well it's a joke.