Aston Martin Vantage V8 exhaust system KY635230CA

The part number KY63-5230-CA (often written as KY635230CA) refers to the Genuine OEM Quad-Tip Rear Muffler Assembly for the Aston Martin Vantage (AM6), specifically for the 4.0L V8 models produced from 2018 through 2024.

This is the main silencer unit located at the very rear of the car, responsible for the signature growl of the Mercedes-AMG sourced V8 engine.

Technical Specifications

• Type: Quad-Exit Rear Silencer (Muffler).

• Configuration: Designed for vehicles equipped with the Quad Exhaust option (four physical tailpipe tips), which was standard on the Vantage S and a popular upgrade on the base Vantage.

• Material: High-grade stainless steel.

• Valved System: This unit features integrated electronic valves. These valves are controlled by the car’s drive modes (Sport, Sport+, Track), allowing the exhaust to bypass certain internal baffles for a louder, more aggressive sound under load.

Variant Differences

It is important to match the suffix of the part number to your specific bumper and tip configuration:

• KY63-5230-CA: The Quad exhaust assembly (most common).

• KY63-5230-AE: The Twin exhaust assembly (for cars with one single large tip on each side).

• KY63-5230-AD: A mid-production revision often seen in European markets.

Common Reasons for Replacement

1. Valve Actuator Failure: The electronic motors that open and close the valves can sometimes seize or develop rattles. While the actuators themselves can sometimes be replaced, internal valve rattles usually require a new muffler.

2. Cosmetic Damage: Because the muffler sits low and the tips are integrated/very close, rear-end impacts often crush the internal piping before the bumper even shows major damage.

3. Upgrading: Owners of “Twin” tip cars often source this “CA” unit along with a new rear diffuser to convert their car to the more aggressive Quad-tip look.

Market Pricing

• New OEM: Approximately $3,500 – $4,200 (£2,800 + VAT).

• Used/Take-off: These are frequently available for $800 – $1,500 because many owners replace them with aftermarket systems (like Capristo, Quicksilver, or VelocityAP) shortly after purchasing the car.

Installation Tip

If you are installing this on a 2018–2024 Vantage, ensure you retain the heat shielding from your original unit. The V8 radiates significant heat into the trunk floor; if the shielding is improperly seated or missing, it can cause the trunk carpet to become excessively hot.