Koyo Aluminum Filler Neck for Evo X/Ralliart (FN2316) *Backorder ETA 5/2026*

Koyo billet aluminum polished radiator filler neck for Evo X and Ralliart models is a direct replacement for the stock plastic piece. Fits with all factory hoses and clamps and includes a 1/8 PT sensor port.

This uses the factory/OEM cap or Koyo SK-C13 or similar cap.

Vehicle Fitment:
2008-2015 Evolution X
2009-2015 Lancer Ralliart

Purchase Includes:
(1) Filler Neck

Features:
• Billet aluminum main neck assembly
• 1/8 PT sensor port (with optional plug)
• Direct replacement for the stock plastic filler neck assembly
• Compatible with OEM hoses and clamps
• Mirror polish

Part Number: FN2316
UPC: 847839020423