$840.00
Unlock the full potential of Porsche’s legendary 4.0L flat-six with the Untd. Performance Exhaust Manifold—engineered for the 991.2 GT3 and GT3 RS. Precision-crafted for naturally aspirated perfection, this high-flow, equal-length manifold maximizes exhaust scavenging, throttle response, and top-end power while enhancing the iconic GT3 sound. Designed for enthusiasts who demand performance without compromise, this is the ultimate upgrade for those chasing lap times or pure driver engagement.
Available on backorder
Unlock the full potential of Porsche’s legendary 4.0L flat-six with the Untd. Performance Exhaust Manifold—engineered for the 991.2 GT3 and GT3 RS. Precision-crafted for naturally aspirated perfection, this high-flow, equal-length manifold maximizes exhaust scavenging, throttle response, and top-end power while enhancing the iconic GT3 sound. Designed for enthusiasts who demand performance without compromise, this is the ultimate upgrade for those chasing lap times or pure driver engagement.
Equal-Length, High-Velocity Runner Design
The Untd. Performance manifold features carefully tuned, equal-length runners to optimize exhaust pulse timing and reduce backpressure. This results in improved scavenging, sharper throttle response, and enhanced high-RPM power—ideal for track days and spirited canyon runs.
Significant Gains in NA Powerband
This manifold is engineered specifically for the unique needs of the high-revving 4.0L GT3 engine, delivering measurable improvements in mid-range torque and top-end horsepower. Whether naturally aspirated or paired with a race tune, the gains are both immediate and linear.
Motorsport-Inspired Exhaust Note
By optimizing exhaust flow and removing restrictive OEM geometry, the manifold produces a sharper, more pronounced exhaust note. The flat-six wail is more aggressive and defined—especially at higher revs—giving your GT3 or GT3 RS an unmistakably race-bred character.
TIG-Welded 304 Stainless Steel Construction
Constructed from premium 304 stainless steel, each manifold is hand TIG-welded for strength and durability under extreme temperatures. CNC-machined flanges ensure a perfect seal and fitment, whether you’re daily driving or pushing the limits on track.
Track-Tested, Competition-Proven
This exhaust manifold is engineered for high-performance environments. Whether you’re shaving tenths off lap times or building a naturally aspirated powerhouse, this upgrade is designed to perform at the highest levels of motorsport.
Porsche 911 GT3 (991.2) 4.0L – 2018–2019
Porsche 911 GT3 RS (991.2) 4.0L – 2018–2020
Fits OEM and most aftermarket cat-back systems
Elevate your Porsche’s performance with the Untd. Performance Exhaust Manifold—a lightweight, high-flow solution that brings out the full character and capability of the 991.2 GT3 platform. Designed for true enthusiasts, this upgrade delivers on every front: sound, power, and precision.
⚠️ Note: For off-road and motorsport use only. Not emissions-compliant in all jurisdictions. Please check local regulations before installation.
