I would like to make sure everyone knows that this kit sandwiches between the fuel line and fuel rail extension tube. If your car already has billet fuel rails, it is unlikely that you still have the 2 bolt flange where this goes. If you have a big return system upgrade, you would not need this as all the aftermarket regulators have fuel pressure test ports on them already. All the CJM fuel systems include a fuel pressure gauge solution already.
So this kit makes a ton of sense for people who did in-tank fuel pump and injector upgrades, but left the fuel system in the engine bay otherwise alone.
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