Review on Holley HOL 12-804 12-804 Fuel Pressure Regulator: Optimal Performance and Fuel Efficiency by Jeff Driscoll

Regulator unfortunately does not reduce fuel pressure as advertised. Like several other reviews, this regulator behaves like a Holley 12-803 at 6-9 psi instead of a Holley 12-804 at 1-4 psi. Returning a regulator required direct contact with the seller, answering half a dozen questions, and spending over $11 on shipping to return a faulty regulator. The seller offered to return the purchase price within 1-3 business days, presumably after receiving it back. If not I will update this review.