Stainless Steel HPX for Ford 7.3L 99-03
The Stainless Steel High Pressure Crossover is meant to allow excess oil pressure to flow between both heads allowing for better supply to the injectors. By allowing the oil the flow to the opposite head, the issue of pressure spikes are less.
HPx line comes with adapters, ready to install.
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Hpx crossover on my 00 ford f350
Ive had it on my 00 7.3l for 3 days now and its a great product well built great fit, pretty simple install. I noticed the “7.3 clatter “ isnt as bad, runs smoother . Even talked my dad into getting one for his 01
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Crossover Tube
First thing I noticed was my 7.3 Econoline idled smoother was much quieter and has slightly better acceleration. Also notice my fuel economy went up about 2 mi per gallon from 17 -19 mpg. The cost of the tube will pay for itself in saved fuel. And installation took about 40 minutes which was very easy.
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Hpx
Easy to install. Hopefully it doesn't leak anytime soon
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Quality and functionality
First impressed by the fit up. Tubing bends, length where spot on and quality of material was excellent Trucks idle is noticeably quieter and smoother. Throttle response seems to be improved as well. Once again happy with RiffRaff products.
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Must have
Idle got smoother and a touch quieter.
Checked my HPOP pressure before and after and it leveled out quite a bit. Before pressure would fluctuate up and down about 80psi. After no more than 5psi which on the scale of 500+ psi at idle thats pretty good.
Super easy install; took me 10 minutes and didn't have to remove any intake piping.
Literally used 2 wrenches. -
Easy peasy
This is a great upgrade. Super easy/ high quality and inexpensive. What more to say.
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Great!
Great little modification, could use a print out of torque specs.
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Great product
Another great part from riff Raff fits perfect took about an hour to install with the Y still in. Riff Raff continues to impress.
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Surprising Results!
I thought this thing was a bit of a gimmick, but I figured I'd give it a shot based on reviews across the internet, and WOW! This should have been a factory part from Ford as part of the 7.3l design! I immediately noticed not only better throttle response, but the engine was significantly quieter at idle, all the way to nearly 2k RPM! I do have a tiny leak from one of the compression fittings, but I can probably work it out by simply removing and re-installing it. Best $50 I've ever spent on my truck!