DB Killer Porsche 718 Boxster / Cayman / Spyder 4.0 H6 (GTS 4.0, GT4, Base, 25 Years)

2026-03-16T10:22:01-04:00

Price: 995.95 - 1055.95 (2 variants)

Auxiliary DB Killer Exhaust System for Porsche 718 4.0 (Boxster / Cayman / Spyder)

Auxiliary exhaust systems are now mandatory at several racetracks, including Circuit Mont-Tremblant. To meet these requirements, A2B developed a bolt-on DB Killer solution that requires no permanent modifications, allowing you to continue enjoying your car at its full performance potential while staying within track sound limits.

Many owners of Porsche 718 Cayman GT4, Porsche 718 Boxster GTS 4.0, and other Porsche 718 4.0-liter flat-six models struggle to comply with strict noise regulations—even when using the factory exhaust system.

This auxiliary DB Killer system provides an effective solution for reducing sound levels while maintaining performance.

Details

Compatible with all Porsche 718 Boxster / Cayman / Spyder 4.0 H6 models, including:

GTS 4.0

GT4

Base 4.0

25 Years Edition

Designed for vehicles equipped with the OEM center exhaust system.

Specifications

Material: 304 Stainless Steel

Construction: Hand TIG welded

Main Tube Diameter: Larger than the OEM diameter to ensure minimal to no impact on engine performance

Installation: Direct bolt-on to the OEM muffler

Modifications Required: None

⚠ Important Installation Note:
The system must be oriented horizontally and pointing to the right side of the vehicle during installation.

Sound Performance

Tested by a member at Circuit Mont-Tremblant to meet the circuit’s strict sub-92 dB(A) sound limits.

Measurements taken at approximately 30 ft and 5000 RPM in Sport+ mode:

Configuration | Sound Level
With A2B DB Killer System | 81.5 dB(A)
OEM Exhaust (No DB Killer) | 94.5 dB(A)

This represents a significant reduction in sound output, making it one of the most effective direct bolt-on DB Killer solutions currently available for the Porsche 718 4.0 platform.

Important Note

Sound measurements can vary significantly depending on multiple factors, including:

Measurement distance

Microphone angle

Environmental and testing conditions

Vehicle configuration