Lamborghini Aventador S LP740 Fi-Exhaust Sport Exhaust

In 2026, the Fi-Exhaust (Frequency Intelligent Exhaust) remains one of the most popular aftermarket upgrades for the Lamborghini Aventador S (LP740-4). It is specifically designed to enhance the high-pitch “F1 scream” of the $6.5\text{L V12}$ while integrating with the car’s factory vacuum-operated valve system.

1. Technical Identification

• System Type: Valvetronic Catback System (usually includes the signature “X-Pipe” design).

• Material Options: * T304 Stainless Steel: The standard, durable choice.

  • Titanium: Significantly lighter (approx. $40\text{%} – 50\text{%}$ weight reduction) and offers a sharper, more metallic exhaust note.

• Valve Control: The system is “Plug-and-Play” with the Aventador S’s drive modes (Strada, Sport, Corsa), but also includes a remote control/app for manual valve overrides.

2. 2026 Market Pricing (Estimated USD)

Fi-Exhaust pricing varies based on the material and whether you opt for the “Gold Edition” or ceramic coatings.

3. Performance & Sound Profile

• The “X-Pipe” Effect: Fi-Exhaust utilizes a specialized X-Pipe geometry that merges the two banks of the V12. This increases the exhaust gas velocity and creates the legendary high-frequency “F1” howl that the stock Aventador S lacks due to its larger, heavier factory muffler.

• Power Gains: While primarily a sound upgrade, you can expect a gain of approximately 15–25 hp and 20–30 Nm of torque, especially when paired with high-flow downpipes.

• Weight Savings: The OEM Aventador S muffler is notoriously heavy (approx. $30\text{kg}$). The Fi-Exhaust stainless version weighs roughly $18\text{kg}$, while the Titanium version drops that to nearly $10\text{kg}$.

4. Installation & Warranty Considerations

• Heat Management: The Aventador S engine bay gets incredibly hot. Fi-Exhaust kits usually come with basic heat shielding, but in 2026, it is highly recommended to opt for Ceramic Coating or specialized heat wraps to protect the nearby carbon fiber and electrical looms.

• CEL (Check Engine Light): If you install the “Catless” downpipes, the car will throw a CEL. You will need an ECU tune or “mini-cat” O2 spacers to resolve this.