PISTON, ACCUMULATOR 904/727/42RE/46RE/47RE/48RE/413/670 (SONNAX )
New Dodge 4 Ring Billet Aluminum Accumulator Piston. Fits 46RH/RE / 47RH/RE / 48RE / 518 / 618 / 500 / 727 / 904. OE plastic accumulators are prone to breaking and have poor sealing qualities. Metal rings currently offered with aftermarket accumulators have issues with sealing as well. PATC now offers a dual seal accumulator piston with 2 Teflon and 2 D-rings. The Teflon seal will prevent piston to bore contact and the D-ring seal will vastly improve sealing compared to steel rings currently offered by the aftermarket. Introductory Price.