The Fuel Pressure Regulator Damper-Rotating Assembly (FPRD-RA) is the ultimate solution for consolidating critical fuel system components into a high-flow package. It is a fully functional high performance pressure regulator with a unique built-in fuel pulse damper.
MOUNTING
This regulator features two M6x1mm threaded mounting holes. A laser cut anodized aluminum mounting plate is provided with 4 countersink M6x1mm bolts/nuts. The FPRD-RA can be mounted any direction including upside down.
PLUMBING
The inlet (side) and outlet (bottom) feature large 10AN ORB (7/8"-14) threaded ports. Two -6AN and two -8AN male adapter fittings are included to suit most aftermarket fuel systems. When installing ORB fittings, first lubricate the O-rings with petroleum oil.
The 1/8" NPT auxilary port can be used for monitoring fuel pressure, temperature, etc. The Radium fuel pressure gauge is commonly used. An included preimpregnated PTFE plug can be used if this port is not needed. When installing a different NPT fitting, PTFE paste is required for proper sealing.
FUEL PULSE DAMPER
The integrated 1:1 fuel pulse damper stabilizes fuel pressure created by the fuel pump, fuel injectors, regulator, etc. The base pressure requirement for maximum damping efficiency is 40-105psi (2.8-7.2bar). This range is base static pressure only. For dynamic fuel pressue outside this range, the vacuum/boost reference line will be required.
NOTES:
1. Base pressure is measured with the fuel pump running without a vacuum line connected to the regulator.
2. This product is NOT FOR USE on the low pressure side of mechanical fuel pumps.
FUEL PRESSURE ADJUSTMENT
RA-series regulators feature the first tool-less pressure adjustment. A jam nut and set screw are no longer required. With a simple turn of the knob, pressure will be increased or decreased.
To aid in adjusting pressure, there are incremental detents that provide haptic feedback to the user. Every detent permits 1psi (+/-0.5psi) of adjustment depending on current fuel pressure.
FUEL PRESSURE STABILITY
With years of track and bench testing data, the RA-series regulators have been refined to optimize pressure management. A newly designed single stainless steel return orifice generates laminar flow that enhances stability control.
Minimum Pressure: 18.5psi (1.3bar)
Maximum Pressure: *N/A
*This is rhetorical. The maximum pressure is dependent on the relief valve inside the pump or the maximum current the fuel pump controller allows.



Fmic was launched out of a passion for automotive in 2009. Since its beginning, we have emphasized the highest quality, constant availability of products and fast delivery of orders. Although we are based in Czestochowa (Poland), we direct our products to customers from all corners of the world. We are one of the best recognized tuning parts stores in Europe. If you are from Europe and are looking for parts to modify your car, there is a high probability that you will come to us. Our goal is to be recognized on other continents as well. In 2023, we started expanding into the Asian market and opened a Fmic Performance branch in Dubai.
Our customer service staff are mainly passionate automotive enthusiasts who are always prompt and willing to advise on technical issues. You can contact them by phone, email, marketplace or chat. We constantly make sure that everyone can find everything they need to modify their car with us. We work with brands such as Radium Engineering, Wiseco, Turbosmart, DEI, Red Line, Ramair, Ulter Sport, EBC, ACL, Winters and many others. We also have our own line of products under the FMIC.Pro brand. Here you will find intercoolers, radiators, downpipes, filters, manifolds, etc. Currently, our store's offer has more than 160 000 of different references of which nearly 40 000 are available off-the-shelf.
The entire Fmic Performance team consists of more than 20 specialists in various fields. But we all have a common goal: to get more satisfied customers. We hope you will be one of them
Most orders are processed within 24 hours of placing the order (working days), in case the item is out of stock this period may be extended. Shipping is realized on working days and we use GLS, Fedex, UPS.
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All items sold are new and come with a full manufacturer's warranty.
Any changes or modifications to the goods purchased on our auctions will result in the loss of warranty and will no longer be returnable. For further information about the warranty of a particular item, please contact us.
FMIC
6/8/10 Boczna St.
42-202 Częstochowa
Poland