STC493 - Non-Return Valve Repair Kit
This one-way valve sits in the vacuum line between the engine inlet manifold (or vacuum pump) and the brake servo. It allows air to be drawn out of the servo to build vacuum, then seals to hold that vacuum so the servo retains braking assistance when manifold vacuum drops. Fitted to applications without ABS.
When will my order arrive?
- Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
- UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
- Netherlands / Belgium / Germany: 2–4 working days.
- Other EU countries + UK: 4–8 working days.
- Outside EU/UK: delivery times vary — contact us for an estimate.
Items may ship from multiple warehouses at no extra cost.