Valvetronic Valved Sport Exhaust System for Porsche 718 GT4 / GTS/ Boxster Spyder
Porsche 718 GT4 / GTS/ Boxster Spyder – Valved Exhaust System Titanium Rear Section • F1 Race Headers • OEM Valve Integration Overview The Porsche 718 GT4 and Boxster Spyder are outstanding driver’s cars, but their factory exhaust note lacks...
Porsche 718 GT4 / GTS/ Boxster Spyder – Valved Exhaust System
Titanium Rear Section • F1 Race Headers • OEM Valve Integration
Overview
The Porsche 718 GT4 and Boxster Spyder are outstanding driver’s cars, but their factory exhaust note lacks the character and intensity enthusiasts expect. Valvetronic Designs changes that. Drawing from our development of the 992 GT3 RS and GT4 RS platforms, this valved exhaust system injects the high-pitch exotic tone Porsche purists crave—transforming the flat stock sound into something truly spine-tingling.
This system blends lightweight titanium craftsmanship, race-inspired headers, and OEM-level integration to deliver a raw, emotional sound without compromising drivability.
Key Components
Signature Titanium Rear Section
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Crafted from premium Grade 5 titanium for extreme weight savings and durability.
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Features a center X-pipe to balance pulses and create a smoother, sharper high-pitched tone.
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Delivers the exotic character reminiscent of Porsche’s naturally aspirated GT engines.
T304 Stainless Steel Over-Axle Pipes
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Built with integrated heat shielding to protect surrounding components.
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Maintains durability under extreme temperatures while improving exhaust flow.
Free Flow F1 Race Headers
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Equal-length T304 stainless design, tuned for sharper pitch and higher-frequency tones.
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Unlocks the raw, motorsport-inspired wail similar to the 981 GT4 and GT3 engines.
OEM Valve Integration
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Fully compatible with Porsche’s PSE button via factory vacuum lines.
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Operates seamlessly:
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Valves Open: Maximum flow, aggressive tone, exotic high-pitch sound.
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Valves Closed: Routed through quad-chamber mufflers for significantly reduced volume, ideal for long drives or discreet use.
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Optional standalone controller included for independent valve control.
Why Upgrade?
From the factory, the 718 GT4 and Spyder sound muted and flat. Our system transforms the experience, pulling inspiration from Porsche’s greatest engines to create a soundtrack worthy of the chassis.
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Aggressive & Emotional: High-pitched notes reminiscent of a GT3.
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Daily Driveable: Docile when valves are closed, aggressive when open.
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Performance-Oriented: Optimized flow for sharper throttle response and improved tone.
Technical Highlights
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Weight Savings: 34.8 lbs lighter than stock.
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Precision TIG Welding: Hand-built for strength and beauty.
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Reversible Design: 100% bolt-on, return to stock anytime.
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OEM Valve Control: No compromises—factory operation retained.
Fitment
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2020+ Porsche 718 Cayman GT4
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2020+ Porsche 718 Boxster Spyder
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2020+ Porsche 718 GTS (4.0)
⚠️ Note on Bracket Design:
Early 2020 GT4/Spyder models (built before February 2020) use different exhaust brackets than later models. Please check your car’s bracket style before ordering. For reference please see the this photo.
Shipping Information
Shipping costs vary by product size, weight, and destination. Please call us for shipping details and a quote before placing your order.
📞 Call 913-291-2027
info@americanfusionwheels.com
Free Local Pickup
Local pickup is always FREE at our shop:
American Fusion Wheels
12310 W 62nd Ter, Shawnee, KS 66216
Please wait for a "Ready for Pickup" notification before arriving.
Professional Installation Available
We professionally install everything we sell — wheels, tires, suspension, exhaust, lighting, audio, and more. When you pick up locally or have items shipped to our shop, our experienced technicians handle the installation so everything is done right.
Call us to schedule your installation appointment.
Freight & Large Item Shipping
Wheels, tires, and oversized items typically ship via freight truck.
- Delivery Appointment: The freight carrier will call you to schedule a delivery window.
- Signature Required: An adult must be present to inspect and sign for freight shipments.
- Inspection Policy: You MUST inspect the pallet and items for damage BEFORE signing the delivery receipt. If items are damaged, note the damage on the receipt before the driver leaves, or refuse the shipment.
Contact Us
For shipping questions, call 913-291-2027 or email info@americanfusionwheels.com
At American Fusion Wheels, customer satisfaction is important to us. We strive to ensure you get the perfect fit for your vehicle. Please review our return policy carefully before making a purchase.
15-Day Return Policy
We accept returns within 15 days of the original purchase date under the following conditions:
- Items must be unused, uninstalled, and in brand-new condition.
- Items must be returned in their original packaging.
- All accessories, hardware, and documentation must be included.
- Proof of purchase (receipt or invoice) is required.
Non-Returnable Items
The following items are final sale and not eligible for return:
- Mounted or installed wheels or tires (once a tire is mounted on a wheel, it is considered used).
- Custom-ordered or special-order items (items not kept in our local inventory).
- Clearance, "Open Box," or discounted items.
- Electrical components (TPMS sensors, lighting, etc.).
- Labor, installation, or service charges.
Wheels & Tires Fitment Responsibility
Customers are responsible for confirming proper fitment before purchase.
- American Fusion Wheels is not responsible for returns due to incorrect fitment once items are mounted or installed.
- If you are modifying your suspension (lifting or lowering), fitment requirements may change.
- We strongly recommend contacting our team before purchasing if you are unsure about sizing, offset, or bolt patterns.
Return Shipping & Fees
- Return shipping is the buyer's responsibility — you are responsible for arranging and paying for return shipping.
- A 15% restocking fee will be deducted from your refund.
- Original shipping charges (if any) are non-refundable.
- Returns must be shipped using a trackable shipping method with insurance.
- We are not responsible for items lost or damaged during return shipping.
Damaged or Incorrect Items
If you receive an item that is damaged or incorrect, please contact us within 48 hours of delivery with photos of the item and packaging. Do not attempt to install a damaged or incorrect part, as installation constitutes acceptance of the product. We will work with you to resolve the issue as quickly as possible.
Manufacturer Warranties
Many of the brands we carry offer specific warranties on finishes and structural integrity. If you experience a defect after the 15-day return window, we will gladly assist you in facilitating a warranty claim with the manufacturer.
How to Start a Return
To request a return authorization (RMA), please contact us:
American Fusion Wheels
12310 W 62nd Ter, Shawnee, KS 66216
913-291-2027
info@americanfusionwheels.com
Returns sent without prior authorization (RMA) will be refused.
Refund Processing
- Approved refunds will be issued to the original payment method.
- Refunds are typically processed within 5-7 business days of the item being inspected at our facility.
- The 15% restocking fee will be deducted from your refund amount.
- Shipping and handling charges are non-refundable.
In-Store Purchases
Return eligibility for in-store purchases follows the same policy and must be approved by management. Returns for in-store purchases must be brought back to our Shawnee, KS location.
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Proudly Serving the Kansas City Metro
Shawnee • Overland Park • Lenexa • Olathe • Leawood • Prairie Village • Mission • Merriam • Roeland Park • De Soto • Lee's Summit • Blue Springs • Independence • Gardner • Spring Hill • Grandview • Raytown • Liberty • Gladstone • Kansas City KS • Kansas City MO
12310 W 62nd Terrace, Shawnee, KS 66216
Mon-Fri: 9:00 AM - 6:00 PM | Sat: 10:00 AM - 3:00 PM
Phone: 913-291-2027

