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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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!
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Great
Loved it
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HPX Crossover rail
I got to say I was very skeptical of this part because I had a hard time believe something as simple as this I would see and hear a difference. It definitely quietened down the truck a little bit at idle (programmer makes it run around 750 rpm with current setting not a fan) but what impressed me most was the struggle to get up to the current fuel mileage was hard to do before adding this and now it gets there without issue. Went from 14.3 mpg hand calculated to 14.9 hand calculated while towing my bass boat. Without towing it was 14.6 mpg to 15.4 mpg for me that made biggest difference. Love the product and I will be buying much more from RIFFRAFF in the future as I go along with my truck build. Was bone dry stock before adding this and AIH Delete plug but it is a start and I'm happy with the results.
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Hpx crossover
Fits like a glove. Great materials, gonna last a long time.
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Good product
Easy to install and engine is alot smoother
