HFS-4 Q&A, application for your engine...

[Richard L]

Originally Posted by Dust

I am looking at a used HFS-6 with push to connects and a red gauge, but buying a blue gauge, and compression fittings and nozzle, and that will put me at $600ish easy on the cheap side. If I am only getting a tweaked HFS-6, then it is one thing, but the list is substantial and applicable to my uses. Small engine with low flow needs now, bigger engine with tuning and higher flow needs later. It seems to fill more roles, better. For an extra $95, I'm in.

It makes more economical sense to buy a complete system, each part is designed to work with each other. Few years down the line, it retains the resale value.