$1,040.00
Unlock raw performance and sharpen the sound of your Porsche 718 GT4 or GTS with the Untd. Performance Catless Downpipe w/ Heat Shield. Engineered for the high-revving 4.0L flat-six, this downpipe removes the restrictive factory catalytic converter, freeing up exhaust flow for quicker throttle response, faster revs, and a dramatically more aggressive exhaust note. Built with integrated heat shielding, it ensures thermal control even under the harshest track conditions—making it the ideal upgrade for serious drivers and enthusiasts.
Available on backorder
Unlock raw performance and sharpen the sound of your Porsche 718 GT4 or GTS with the Untd. Performance Catless Downpipe w/ Heat Shield. Engineered for the high-revving 4.0L flat-six, this downpipe removes the restrictive factory catalytic converter, freeing up exhaust flow for quicker throttle response, faster revs, and a dramatically more aggressive exhaust note. Built with integrated heat shielding, it ensures thermal control even under the harshest track conditions—making it the ideal upgrade for serious drivers and enthusiasts.
Catless, Unrestricted Flow
Designed for maximum performance, this downpipe eliminates the OEM catalytic converter, reducing backpressure and increasing exhaust velocity. The result: improved low-end torque, sharper midrange punch, and stronger top-end pull—especially when paired with a performance tune.
Race-Inspired Exhaust Tone
Removing the cat lets the 4.0L flat-six breathe and scream like it should. Expect a more visceral, motorsport-style exhaust note—crisper, louder, and more aggressive—while preserving the naturally aspirated character of the 718 GT4/GTS platform.
Integrated Heat Shielding
High-output engines generate intense heat. That’s why this downpipe includes a built-in heat shield to protect critical engine bay components and minimize heat soak—essential for consistent performance during extended track sessions or aggressive road driving.
Premium Stainless Steel Construction
Fabricated from TIG-welded 304 stainless steel, this downpipe is built to endure the high temps and pressure of performance driving. CNC-machined flanges ensure perfect fitment and a reliable, leak-free seal.
Track-Ready Performance
Purpose-built for drivers pushing their 718 to the limit, this catless downpipe supports increased power, faster rev response, and the kind of sound that turns heads on track or in the canyon. A must-have for serious NA builds.
Porsche 718 Cayman GT4 (2020+)
Porsche 718 Boxster/Cayman GTS 4.0 (2020+)
Fits with OEM and most aftermarket exhaust systems
For those chasing maximum sound, power, and precision from their 718, the Untd. Performance Catless Downpipe w/ Heat Shield delivers true motorsport character. From reduced restriction to thermal control, this upgrade redefines what your flat-six can do.
⚠️ Note: For off-road and track use only. Not emissions-compliant in all jurisdictions. Please check local regulations before installation.
