Mazda RX7 V-Mount Kit/20B FD3S Air Separator Tank/ Water Swirl Pot/ AST Delete Tank

Running a V-Mount kit or 20B engine conversion in your FD3S RX-7?
This redesigned Vinny Fab Upper Water Neck provides the extra clearance your setup needs — no compromises.

Manufactured from our Vinny Fab 12 mm CNC-machined stainless flange, this piece offers precise fitment, strength, and reliability. It’s been engineered to clear larger pulleys and deliver improved for custom or high-performance builds.

Features & Benefits

⚙️ V-Mount / 20B Clearance Design: Provides additional space for modified cooling layouts.

🧱 12 mm Vinny Fab CNC Flange: Machined in-house for perfect sealing and durability.

💧 Dual Sensor Ports: Includes provisions for water-level sensor and 1/8 NPT sensor.

🔩 Large Flow Capability: 16 AN fitting and 38 mm tube for high-volume coolant flow.

🎨 Finish Options: Raw / Brushed, Polished, or Satin Black.

⚠️ Compatibility: Fits with large water-pump pulleys; not for twin-turbo setups.

Perfect for anyone upgrading to a 20B or running a V-Mount intercooler system who needs dependable cooling and proper clearance.