BBK Performance BBK 1706 Fuel Pressure Regulator - Fully Adjustable - CNC Machined Billet Aluminum - Direct Fit for Ford Mustang 5.0 And 302/351 EFI Applications

Was a super nice upgrade! Love the look and functions perfectly.

Work Perfect on my set up

This is a pretty hunk of aluminum and that's about it. I bought this to replace my old one that started leaking. This one leaked fuel out the vacuum port (just like the old one) before I could even adjust the pressure. It would make a nice Christmas ornament, as it is pretty and shiny... but that about all it has going for it. BBK wants 50 bucks for the replacement rubber, which is ridiculous. This was returned for a refund. As always, amazon returns are simple and painless. I bought another vendors regulator since I simply don't trust the BBK ones after this experience.

The unit came with the regulator out of the plastic package and was rolling around

This thing sucks.Old school wisdom (codified in old foxbody forums) dictates that you can run this to fix fuel trims on a stock Ford ECU after heads, cam, and intake. On my 1995 F150 Lightning with head only (no cam and intake due to speed density), I was running about 1-2 points too lean on stock injectors and regulator. I bought this and tried running this on the stock 19# injectors but found I was still too lean at high revs even with a lot more pressure dialed in. I then tried several sets of aftermarket 21#, 22#, 24#, and 30# injectors. No matter what, the fueling was always much leaner at WOT than at idle. If I adjusted it so WOT was sufficiently rich, it would be crazy rich at idle (like 9-10). Alternatively, if I adjusted it so it was tolerable at idle, it would be very lean at WOT (like 13-14).I finally fixed all my problems by switching back to the stock fuel regulator and running aftermarket 24# injectors. My engine idles exactly like stock and the AFRs are perfect under all load conditions.The moral of the story is that the stock unit increases pressure more between idle and WOT than the BBK unit. In other words, the BBK unit has exactly the opposite fuel pressure curve that you'd want from an aftermarket regulator that's intended to support more fuel on hopped up engines (which tend to be more efficient and therefore need more fuel towards WOT).

I have been using this in my 1993 Mustang since 2010. I am running non-stock fuel rails so I can't speak to mounting it to the standard fuel rail.It regulates the fuel pressure just as it should, it is easy to adjust, and the optional side mounted fuel pressure gauge is perfect.I was able to regulate from 40 to 65 in my system.Just bought my second one this week. Read why below.At 1000 miles the first one failed. Gas started to leak thru the vacuum port. I disassembled it and found a diaphragm composed of two thin layers of rubber had developed a leak.I replaced the entire regulator with the second unit. I disassembled it to compare and found that BBK has changed their design to a single thicker membrane. Time will tell if this is better.I checked BBK's web site and they offer a rebuild kit for about 50.00Given all that, I think three stars is generous.4.29.2019 update. The newer design replacement is still working well. Still happy with the product.

I did not like even giving this a 1 star. It is the worst engineering I have ever seen for a high pressure fuel system. It leaked in numerous locations, the adjusting screw was about maxed out just to get to 40psi. I would not let my worst enemy put this on any car. It is a fire waiting to happen. Scroll past and buy something different

This works well, especially when used on a set of BBK fuel rails. However, I purchased this one to replace the exact same regulator that suffered a catastrophic failure after only 1,000 miles, so I will have to continue to monitor its performance over time.