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Weldona, Colorado 970-368-4455

DieselOrings is a small, family owned and operated business located in the sparsely populated plains of Northeastern Colorado.
UPS is delivering orders in a reasonable time compared to what we see with USPS.
Please understand that these delays are out of our control.
  3/26/2020 - UPS has suspended Guaranteed Delivery for Next Day Air, 2nd Day Air, 3 Day Select and Ground.
UPS has denied all claims for missed delivery dates. (LINK)


FPR Springs

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#7-035 Fuel pressure shim springs

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Availability: In stock

#7-035 Fuel pressure shim springs

3 springs to allow you to set your fuel pressure to the performance levels that you wish to achieve
for 1999 - 2003 Ford 7.3L Diesel
Three different fuel pressure spring settings*
  1. 58-61 psi  silver spring  (Stock pressure)
  2. 62-65 psi  gold spring
  3. 67-70 psi  black spring

*Note: Fuel pressure data was gathered by using a analog mechanical guage on a test bench using a 2001 fuel bowl with no fuel filter and a Walbro GSL-392 fuel pump. The housing was then moved to live testing on a 2002 7.3L F350 and using multiple springs, a digital fuel pressure gauge rated at 1/2 of 1% accuracy and a stock Ford Bosch fuel pump, identical data was collected. Due to accuracy tolerances of various pressure gauges and spring tensions from the manufacturing process, your pressure readings could have variances from these results.

Orders Over $99 with *Free Shipping on US orders ships via US Postal Mail including Hawaii, Alaska and PR. Weight restrictions apply to Hawaii, Alaska and PR
*Free Shipping on large and/or heavy orders ships via UPS and only applies to orders to addresses within the Continental US (excluding Alaska).
UPS shipments outside the Continental US will incur additional charges.