Vinny Fab FD3S RX-7 Rear-Exit Oil Filler Neck (with Billet Oil Cap)

Designed to replace the factory oil filler neck, this upgraded Vinny Fab design relocates the outlet to the rear for easier access, a tidier engine bay, and superior oil control under boost.

Each neck features our custom CNC-machined billet aluminium flange, precisely engineered with internal baffling to stop excess blow-by from escaping through the filler neck — a common issue in high-performance rotary engines. This design ensures cleaner operation, better crankcase control, and reduced oil mist in breather systems.

Now supplied with our new Vinny Fab billet oil cap, precision-machined to complement the filler neck perfectly, adding a refined and functional finish to your rotary build.

Choose from -10AN or -12AN fittings to match your breather setup. Each unit is available in a range of finishes to suit your engine bay aesthetic: Raw, Satin Black, or Texture Black.

Includes full hardware: 2 × M6 × 25 mm stainless bolts and a high-quality O-ring seal for leak-free installation.

Note: This is a made-to-order product. Please contact us for current