Porsche 718 Cayman GT4 / GTS / Spyder 4.0L Exhaust Manifold Headers

Unleash Maximum Flow & Flat-Six Acoustic Purity — CEES Porsche 718 4.0L Performance Exhaust Manifold Headers

Maximize the exhaust scavenging and acoustic velocity of your naturally aspirated Porsche with CEES Performance Exhaust Manifold Headers, engineered exclusively for the Porsche 718 Cayman GT4, GTS 4.0, Boxster GTS 4.0, and 718 Spyder (4.0L Flat-6 9A2 Evo). Replacing the restrictive factory exhaust manifold runners, this long-tube merge-collector system dramatically optimizes exhaust gas expulsion, sharpens throttle response across the entire rev band, and unlocks the raw, visceral high-pitch motorsport soundtrack this 4.0L boxer engine was built to deliver.

🚀 Engineering Highlights

• Equal-Length Long-Tube Geometry: Precision-engineered runner lengths ensure synchronized exhaust pulses, dramatically improving cylinder evacuation, minimizing exhaust backpressure, and generating broad mid-range torque and top-end horsepower gains.
• High-Velocity Merge Collectors: Pyramid merge collectors guide high-velocity exhaust gases smoothly into the over-axle pipes without turbulent bottlenecks or energy loss.
• Track-Grade T304 Stainless Steel Construction: Crafted from aerospace-grade, mandrel-bent T304 stainless steel tubing with hand-finished TIG welds and thick CNC-machined flanges to withstand extreme endurance track temperatures.
• Versatile Emission & Sound Options: Available as unrestricted Catless Race Headers for all-out competition sound and power, or Sport Headers with High-Flow Catalytic Converters (100 / 200 / 300 Cell) for balanced emissions control and aggressive tone.
• Laser-Scanned OEM Precision Fit: 100% bolt-on replacement directly onto factory engine cylinder heads, connecting seamlessly to OEM over-axle pipes (OAP) or aftermarket link pipes.

📊 Technical Specifications

✨ Bespoke Your Build — Chat with Our Specialists on WhatsApp

• WhatsApp: +86 15626172519
• Email: cees-exhaust@qq.com

📦 Production & Shipping

• 🛠️ Production Time: Built to order in 2–4 weeks (in-stock options ship in 6–12 business days)
• 🚚 Shipping: Premium express via DHL / FedEx / UPS — estimated 7–15 business days to your door
• 📦 Free shipping

FAQ

1. What performance gains can I expect from CEES 718 4.0L Headers?

By replacing the restrictive factory manifolds with equal-length runners and high-velocity merge collectors, backpressure is significantly reduced. This allows the 4.0L flat-six engine to breathe freely, delivering noticeable horsepower and torque improvements throughout the mid-to-high RPM range along with razor-sharp throttle response.

2. What is the difference between Race Headers and Sport Headers?

Race Headers are completely catless (no catalytic converters), offering maximum flow, lightest weight, and the loudest, rawest track-focused exhaust scream. Sport Headers incorporate high-flow metallic catalytic converters (100, 200, or 300 cell) that reduce exhaust odor and soften emissions while still providing vastly improved airflow over factory manifolds.

3. Is this header system compatible with the factory exhaust and over-axle pipes?

Yes. The CEES Exhaust Manifold Headers are 100% bolt-on and bolt directly to factory Porsche cylinder heads, mating perfectly with either OEM over-axle pipes (OAP) or CEES high-flow link pipes and valved catback exhaust systems.

4. Are you a direct manufacturer?

Yes — CEES Exhaust is a direct manufacturer based in Guangdong, China. We design, laser-scan, bend, and hand-weld every exhaust component in our factory with rigorous quality inspection.