Valvetronic Valved Sport Exhaust System for Porsche GT3/RS 991.1 / 991.2Porsche 991 GT3 GT3 RS Valved Sport Exhaust System F1 Inspired RSR Sound 9000 RPM Symphony Overview This system is truly unparalleled in sound quality. After over a year and a half of dedicated research and development, weve engineered an exhaust experience that must be heard to be believed. When Porsche introduced the DFI engine in the 991 GT3, many feared it would lack the soul of the legendary Mezger. But with a screaming 9,000 RPM flat six,

Porsche 991 GT3 / GT3 RS – Valved Sport Exhaust System

F1-Inspired • RSR Sound • 9000 RPM Symphony

Overview

This system is truly unparalleled in sound quality. After over a year and a half of dedicated research and development, we’ve engineered an exhaust experience that must be heard to be believed.

When Porsche introduced the DFI engine in the 991 GT3, many feared it would lack the soul of the legendary Mezger. But with a screaming 9,000 RPM flat-six, Porsche delivered in spades. Still, the factory setup leaves much to be desired when it comes to rawness and that elusive F1-style sound.

At Valvetronic Designs, we’ve crafted a system that elevates your GT3 experience. Featuring 2.5-inch piping, a large stamped cross-section X-pipe, and added loop sections to lengthen the exhaust path, this setup achieves the high-pitch motorsport tone enthusiasts crave. Combine it with our free-flow headers, and your 991 becomes one of the most exhilarating sounding machines on the road.

Sound Dynamics

This exhaust is designed to emulate the Porsche RSR race car:

• Valves Open: An uncompromising sound experience with aggressive flames on upshifts and a crescendo that builds all the way to the 9000 RPM redline. Pure F1-inspired drama.

• Valves Closed: Volume is tamed for comfort on long motorway drives or early-morning starts. Cabin drone is eliminated, keeping the experience refined even with valves shut.

Features

• Full 2.5-inch system from front to back

• Large stamped cross-section X-pipe for F1 tone

• Added loop sections for enhanced sound pitch

• Optional free-flow headers for maximum performance and sound quality

• Vacuum-actuated exhaust valves with factory-like operation

• Precision TIG welds for high strength and durability

• 100% reversible – always able to return to stock

Fitment

• 2014–2019 Porsche 991 GT3

• 2016–2019 Porsche 991 GT3 RS