RENNVOX McLaren 720s Decat Downpipes

Unlock a more aggressive exhaust character from the McLaren 720S with RENNVOX Decat Downpipes, developed specifically for closed-course motorsport and track applications.

Designed to replace the restrictive factory catalytic converter assemblies, the RENNVOX decat downpipes provide a significantly less restrictive exhaust path from the twin-turbocharged 4.0-litre V8. Removing the catalytic converter cores reduces exhaust restriction and allows the turbochargers to expel exhaust gases more freely, creating a sharper, louder and more immediate exhaust note.

The freer-flowing design is particularly suited to modified and track-focused McLaren 720S vehicles where exhaust flow, response and sound are priorities. When combined with appropriate ECU calibration and supporting modifications, the reduced exhaust restriction can also support increased performance potential.

Engineered as direct replacement downpipes for the McLaren 720S exhaust layout, the system is designed to integrate with the vehicle's existing turbocharger and exhaust connections for a clean installation.

IMPORTANT – MOTORSPORT USE ONLY: These decat downpipes remove the factory catalytic converters and are intended exclusively for closed-course motorsport, competition and track use. They are not designed, certified or approved for use on public roads. Removal of factory catalytic converters may breach emissions and vehicle regulations. Customers must confirm the applicable laws and regulations in their jurisdiction before installation or use.

Check Engine Light / ECU Calibration: Removal of the factory catalytic converters may trigger a Check Engine Light (CEL) or emissions-related diagnostic fault codes due to the vehicle's post-catalyst monitoring system. Appropriate motorsport ECU calibration may be required depending on the vehicle configuration. ECU tuning is not included with the downpipes.

FAQ

Are RENNVOX McLaren 720S Decat Downpipes legal for road use?

No. These downpipes remove the factory catalytic converters and are intended for closed-course motorsport and track use only. They are not intended or approved for use on public roads.

Will these downpipes make my McLaren 720S louder?

Yes. Removing the factory catalytic converters significantly changes the exhaust character, producing a louder, more aggressive and more direct V8 exhaust note. The final sound will also depend on the remainder of the exhaust system fitted to the vehicle.

Will decat downpipes improve performance?

The reduced exhaust restriction can improve exhaust flow and support greater performance potential, particularly on vehicles with appropriate ECU calibration and supporting modifications. Actual gains will depend on the vehicle specification, tune and other modifications.

Will installing decat downpipes cause a Check Engine Light?

It may. The McLaren 720S uses post-catalyst monitoring, and removing the catalytic converters can result in a Check Engine Light or emissions-related diagnostic fault codes. Appropriate motorsport ECU calibration may be required.

Is ECU tuning required?

ECU calibration is recommended where the objective is to optimise the vehicle for the reduced exhaust restriction and other performance modifications. Requirements can vary depending on the vehicle and its existing calibration.

Can these downpipes be used with a RENNVOX exhaust system?

Yes. The RENNVOX McLaren 720S Decat Downpipes can form part of a complete RENNVOX performance exhaust package, providing a freer-flowing exhaust path from the turbochargers through the remainder of the system.

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