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The Radium Engineering wide‑range fuel pressure regulator spring is made for use with Radium MPR, DMR, and FST‑R regulators and adjusts linear pressure between roughly 60 psi and 80 psi. The stainless steel spring increases the regulator’s usable adjustment span, providing broader, more linear pressure tuning when paired with the specified Radium regulator models.
Radium Engineering FPR Spring- Wide Range (Use with Radium MPR, DMR, and FST-R)
