Testpipes - Dierestriction pipes (42GT/GranSport) E4

Our high-performance exhaust pipe eliminates the restrictive factory "dent" and removes the large secondary catalytic converters, significantly improving exhaust flow and engine efficiency. This upgrade is specifically designed for EU4-compliant vehicles (2006-2007) and all US-spec Maseratis, offering enhanced power output and a more aggressive exhaust note.

Key Features:

• Dent Removal: The restrictive "dent" in the factory exhaust system is eliminated using a precision-stamped oval merger, designed to maintain the same diameter flow as the surrounding piping. This modification improves exhaust gas flow and reduces backpressure, unlocking more horsepower and torque.
• Secondary Catalytic Converter Delete: The large, restrictive secondary catalytic converters are removed to further improve exhaust flow. This results in more efficient exhaust scavenging, which enhances engine performance and throttle response. Note: Removing these catalytic converters may affect emissions compliance in certain regions.
• Optimized Design: The single-piece construction of this exhaust section eliminates the need for additional welds, which reduces potential stress points and minimizes the overall weight. This design contributes to greater durability and a smoother exhaust flow.
• Maximum Ground Clearance: The oval merger design provides superior road clearance without compromising exhaust flow, ensuring the system remains unobstructed while maintaining optimal performance.

Benefits:

• Improved Exhaust Flow: By removing the restrictive dent and secondary cats, this upgrade reduces exhaust backpressure, improving overall engine efficiency and allowing for more power.
• Enhanced Durability: The single-piece design reduces welding stress and weight, resulting in a stronger, more reliable exhaust system.
• Aggressive Sound: Removing the secondary cats adds a more pronounced and aggressive exhaust note, complementing your vehicle's performance upgrade.

This exhaust pipe is the perfect upgrade for enthusiasts looking to improve their vehicle’s exhaust flow, enhance engine performance, and achieve a more aggressive sound, all while maintaining optimal clearance and reliability.

Compatibility:

• EU4 (2006-2007)
• US Spec vehicles