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Fabspeed Sport Cat Downpipe Porsche 718 Boxster / Cayman (2017+)

Price
$3,625.95
Currently Backordered - You can still place your order and we'll ship your order as soon as the product is back in stock!

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Installation Services

Don’t worry about the hassle — let our expert team at Forza Motorworks handle the installation for you. Our professional installation ensures everything fits and operates exactly as intended, giving you clean, factory-quality results, proper wiring or mounting, and avoiding the risks of DIY mistakes. You’ll save time, avoid frustration, and get peace of mind knowing the job is done right the first time. Contact us to learn about our installation services and enjoy a seamless upgrade from day one.

FAQ

Shipping Information
For items that are in stock, purchases made after 9am EST will be usually be shipped out in the next 1-2 business days. Please inquire to confirm lead times if you have specific time constraints. Orders will be sent via signature required at our discretion unless otherwise requested.

International Shipping
Any and all customs duties, taxes, import fees, and/or tariffs assessed in connection with the purchase shall be the sole responsibility of the customer/end user.

Return Policy
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return. To be eligible for a return, your item must be in the same condition that you received it, unused and in its original packaging. All returns are subject to a restocking fee based on item and package condition. Buyer is responsible for paying for return shipping costs. If you need a return label, we will email you a return label and deduct cost from refund. Original shipping costs are not refundable. Special order items are not eligible for return.

Cancellation Policy
In order to cancel your order you must email within 24 hours of placing your order or before your order has shipped, whichever occurs first. Special order items are not eligible for cancelation.

Exchange Policy
We have a 30-day exchange policy, which means you have 30 days after receiving your item to request an exchange. To be eligible for an exchange, your item must be brand new in box. Buyer is responsible for paying all shipping costs to exchange product.

Product Description

The Fabspeed Sport Cat with Downpipe replaces the restrictive factory catalytic converter and downpipe on 2017+ 718 Boxster / Cayman with a high-flow, performance-oriented stainless system. Using one of the largest, OEM-fit high-flow catalytic converters available (German-made HJS), and mandrel-bent stainless tubing, this upgrade improves exhaust flow and throttle response — while retaining emissions compliance and avoiding check-engine issues. The result: a richer, deeper boxer-engine rumble, sharper turbo response, and a noticeable gain in mid-range power and overall drivability.

Fitment Notes

  • Designed for Porsche 718 Boxster / 718 Cayman models from 2017 onward (Base, S, GTS, and applicable trims). 

  • Direct bolt-on replacement for the stock catalytic converter and downpipe — uses factory mounting points. 

  • Because it uses a compliant high-flow catalytic converter, the setup maintains emissions filtering and is engineered to avoid triggering check-engine lights under normal operation.

Included

  • High-flow catalytic converter (HJS 200-cell EURO 6 trimetal catalytic converter) sized to maximize flow while fitting in stock location.

  • Mandrel-bent T304L stainless steel downpipe section (primary 3" tubing transitioning to dual 2" outlets) for optimal flow and fitment. 

  • All required mounting hardware, flanges, and gaskets for a clean bolt-on installation (no cutting or fabrication needed).

Product Specs

  • Catalytic Converter Type: HJS 200-cell trimetallic catalytic converter — high-flow, emissions-compliant, largest fitment possible for the 718 chassis. 

  • Pipe Material: T304L stainless steel, mandrel-bent for smooth internal flow and durability. 

  • Primary Tube Diameter: 3.0 inches (≈ 76 mm) — maximizes exhaust flow from turbo/downpipe junction. 

  • Outlet Configuration: Transition to dual 2.0-inch pipes continuing into stock or aftermarket exhaust downstream. 

  • Estimated Power Gain (stock exhaust downstream): ~ +20 wheel horsepower (whp) across the RPM band compared to factory downpipe.

  • Exhaust Sound / Character: More pronounced boxer-engine rumble with deeper tone and enhanced turbo burble under load — with no excessive drone in normal driving. 

  • Fitment: Direct bolt-on — designed for factory turbo layout and exhaust routing, with no modifications needed. 

  • Warranty / Build Quality: Built with hand-welded stainless steel components; installation hardware included; backed by Fabspeed’s warranty program.

Product Features

  • High-Flow Catalytic Converter for Compliance + Performance — The HJS high-flow cat delivers exhaust flow close to that of a straight pipe while maintaining emissions filtering and avoiding check-engine lights.

  • Improved Turbo Spool & Throttle Response — Reduced back-pressure accelerates turbo spool-up and delivers sharper throttle response and mid-range punch — noticeable in everyday driving and spirited acceleration.

  • Enhanced Exhaust Note without Excessive Drone — Deepened boxer exhaust tone with stronger burbles and pops on throttle and shift, while staying manageable for street use.

  • Bolt-On, OEM-Friendly Installation — No cutting, welding, or custom fabrication required — makes this an easy garage or shop install with factory mount points.

  • Durable, Corrosion-Resistant Construction — Stainless-steel tubing and quality welding ensure longevity even under aggressive driving or occasional track use.

  • Solid Base for Future Mods — With improved exhaust flow and minimal restriction, this downpipe/cat setup creates a strong foundation for further upgrades (intake, tune, full exhaust) for bigger gains.