Anodized aluminum replacement orifice for many Radium Engineering products including MPR, DMR, FPR-D, FST-R regulators.

If you have problems with fluctuating fuel pressure, the nozzle is too large. If you can't get the fuel pressure down, the nozzle is too small.

If fuel pressure ever flutters or the return lines vibrate at low engine demands (idle), there is a small black orifice available (14-0370). It is for fuel systems that have high flowing pump(s) but use an OEM “restrictive” fuel line. 

• Color Silver = Size 4.45mm /0.175"