Bull Boost Performance
Catted High Flow Exhaust Downpipe for Porsche Cayman 718 GT4 RS 4.0L 2022-2025
Catted High Flow Exhaust Downpipe for Porsche Cayman 718 GT4 RS 4.0L 2022-2025
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Upgrade the exhaust flow and sound of your Porsche 718 Cayman GT4 RS 4.0L with the STRATEC™ Catted High-Flow Exhaust Downpipes, engineered to reduce restriction while maintaining high-flow catalytic converters.
Designed for the naturally aspirated 4.0L flat-six, these downpipes improve exhaust evacuation, sharpen throttle response, and enhance the aggressive high-RPM character of the GT4 RS.
Key Features
- High-Flow Catted Downpipe Design
- Performance Catalytic Converters
- Reduced Exhaust Restriction
- Improved Exhaust Flow
- Sharper Throttle Response
- Increased Horsepower & Torque Potential
- Enhanced High-RPM Flat-Six Sound
- Precision TIG-Welded Construction
- CNC-Machined Flanges
- Direct-Fit Performance Layout
Performance Benefits
- Improved Exhaust Scavenging
- Reduced Backpressure
- Stronger Mid-Range and High-RPM Flow
- Increased Performance Potential
- More Aggressive Exhaust Note
- Enhanced Gearshift and Acceleration Acoustics
High-Flow Catted Design
The STRATEC™ downpipes are designed to provide significantly improved exhaust flow while retaining catalytic converters for a more refined alternative to a fully catless setup.
The result is a stronger exhaust tone and improved flow without the extreme sound level associated with completely unrestricted race pipes.
Construction
- Premium T304 Stainless Steel
- High-Temperature Performance Construction
- Mandrel-Bent Tubing
- Precision TIG Welds
- CNC-Machined Connection Flanges
- Smooth Internal Transitions
- Corrosion-Resistant Finish
Package Includes
- Left High-Flow Catted Downpipe
- Right High-Flow Catted Downpipe
- Installation Hardware
- Gaskets Where Applicable
Vehicle Fitment
Porsche 718 Cayman GT4 RS
- 2022-2025
- 4.0L Naturally Aspirated Flat-6
Shipping & Returns
Shipping & Returns
Shipping on most orders in 24-48 hours special orders can be 2-3 days. Returns see Returns Policy.
We have a 30-day return policy on most products, which means you have 30 days after receiving your item to request a return. Some products carry a longer manufacture warranty please contact us if you have questions about items.
To be eligible for a return, your item must be in the same condition that you received it, unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
To start a return, you can contact us at overthehilltractor@gmail.com. Please note that returns will need to be sent to the following address: 2005 Stuarts Draft Hwy, Stuarts Draft, VA 24477
If your return is accepted at damage or defective, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.
If your return is due to no longer needed, wrong size order, ordered by mistake, found better pricing, etc the customer is responsible for the return shipping cost.
Any item returned over $50 cost we suggest insurance on package.
You can always contact us for any return question at overthehilltractor@gmail.com.
Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, we can only give 72 hours from time package is scanned delivered to accept claims. Please contact within 72 hours of delivery so that we can evaluate the issue and make it right.
Exceptions / non-returnable items
Certain types of items cannot be returned, like fuel related items due to hazardous materials shipping regulations. We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.
Electrical parts can only be returned if new and in original condition, Used electrical parts are not returnable unless actually defective, contact us with details.
Unfortunately, we cannot accept returns on sale items or gift cards.
Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 10 business days. Please remember it can take some time for your bank or credit card company to process and post the refund too.
If more than 15 business days have passed since we’ve approved your return, please contact us at overthehilltractor@gmail.com.
Most items are covered by 30 day warranty, Fuel Related parts are only covered against actually manufacture defect since the fuel produced today breaks down gaskets and seals quickly. Electrical parts can only be returned if new and in original condition, Used electrical parts are not returnable unless actually defective, contact us with details. Returns are handled on each individual item, some items will not require return for refund just that customer submit picture of proof of issue. Please contact us with questions about returns.

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Free Shipping
Free shipping on orders over $150
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