Radium Engineering 20B-REW primary conversion fuel rail 20-0464 at Tuned By Shawn
Radium anodized rail on three-rotor, Tuned By Shawn
Radium 20-0464 rail, sold by Tuned By Shawn
Radium 20-0464 rail, sold by Tuned By Shawn

Vendor:Radium Engineering

Radium Top Feed Conversion Primary Fuel Rail | Mazda 20B-REW (20-0464)

SKU: 20-0464

Sale price$180.45Regular price $189.95
From Shawn: Not sure this product is right for your build? Email me at service@tunedbyshawn.com before you order. I answer these myself.

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Manufacturer Limited Warranty

Product details

Description

Three rotors, side-feed injectors, 1990s parts support: the Cosmo's primary rail problem, solved in billet.

The Radium Engineering Top Feed Conversion Primary Fuel Rail for the Mazda 20B-REW serves the three-rotor originally found in the 1990-1995 Mazda/Eunos Cosmo: a high flow aluminum rail, anodized black for compatibility with all popular fuel types including E85, manufactured with a large internal bore supporting all necessary engine power requirements, and converting the primary injector positions to common top feed fuel injectors. The rail that frees a 20B build from hunting discontinued side-feed injectors. Injectors sold separately.

What You'll Feel

  • The modern injector catalog opened to the 20B's primary positions
  • Delivery headroom for three-rotor power, single turbo or triple
  • E85 confidence through the anodized aluminum construction
  • Serviceable, ORB-ported plumbing replacing 30-year-old factory hardware

Features

  • Top feed conversion primary rail for the Mazda 20B-REW (1990-1995 Cosmo)
  • CNC machined aluminum, anodized black; large internal bore; 8AN ORB ports
  • Converts primary positions to common top feed injectors (not included)
  • All popular fuel types including E85

The Details

Conversion rails change the injector style, which is the entire point on the 20B, whose factory side-feed primaries long ago fell out of production support, and Radium's install pattern handles both directions: aftermarket top feed injectors use the provided injector seats pressed into cleaned OEM ports with lubricated O-rings, while OEM style injectors skip the seat step per the instructions. Plumbing configures to the rail's 8AN ORB ports per your system, with the secondary rail (20-0465) completing the engine and the 8AN FPD-R damper a natural companion in the primary feed. Verify injector compatibility against Radium's documentation before ordering, and follow the leak-check discipline at first start.

Kit Includes

  • 1x Anodized top feed conversion primary rail with injector seats and mounting hardware
  • Injectors and plumbing fittings NOT included

Applications

  • Mazda 20B-REW three-rotor (1990-1995 Mazda/Eunos Cosmo, swaps)
  • Pairs with the 20-0465 secondary rail