Valvetronic's free flow headers unlock the 991 GT3's full sonic and breathing potential. Purpose-built for the naturally aspirated flat-six, these headers eliminate restrictive factory geometry while maintaining the structural integrity and heat management your engine demands.

What sets them apart:

• Mandrel-bent 304 stainless construction for longevity and flow efficiency
• Optimized collector design that reduces scavenging losses and improves mid-range response
• Direct bolt-on fitment—no cutting, no welding, no guesswork
• Dyno-validated gains across the powerband; expect 8–12 hp and noticeable torque throughout
• Works seamlessly with factory and aftermarket exhaust systems

The 991 GT3 is engineered to reward precision tuning. These headers are the foundation of any serious breathing upgrade. Whether you're tracking or simply want your engine to sound and perform as it was intended, Valvetronic delivers the engineering credibility and fit quality that separates real gains from marketing claims.

Fits: Porsche 991.1 and 991.2 GT3 (naturally aspirated models only).