Click to zoom in
SKU: POR.991GT3.SMBV
Fabspeed Porsche 991 GT3 / GT3 RS Side Muffler Bypass Pipes (2014-2016)
Fabspeed Side Muffler Bypass Pipes replace the factory side mufflers on 2014-2016 Porsche 991 GT3 and GT3 RS models. These pipes improve exhaust flow for better performance deliver a louder aggressive exhaust note and cut 34 lbs from the rear end. Pair them with Fabspeed Long Tube Competition Headers for full exhaust flow from the 3.8L or 4.0L flat-six engine.
Key Features
- Precise Fitment: Designed for all 2014-2016 Porsche 991 GT3 and GT3 RS vehicles with direct bolt-on installation
- Helical Valves: Premium helical internal valves control sound and flow for track or street driving
- O2 Sensor Bungs: Built-in bungs maintain factory ECU functionality especially with Fabspeed Long Tube Competition Headers
- Weight Reduction: Saves 34 lbs from the rear of the vehicle improving handling and acceleration
- CUP Car Sound: Delivers the raw aggressive exhaust tone of Porsche GT3 Cup race cars right on the street
- Construction: Mandrel-bent 14-16 gauge T304 stainless steel for durability and corrosion resistance
- Warranty: Backed by Fabspeed lifetime structural warranty on welds and material defects
Product Notes
- Valves controlled via factory Porsche Homelink or aftermarket remote for open or closed positions
- Clean regularly with mild soap to preserve stainless steel finish and prevent carbon buildup
- Boxed dimensions 48 x 14 x 12 inches for secure transit
Installation Notes
- Professional installation recommended.
- Bolt-on design uses factory mounting points no welding or cutting required
- Compatible with factory cats or Fabspeed headers O2 extensions may be needed for catless setups
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2014 | Porsche | 911 | GT3 (991) |
| 2015 | Porsche | 911 | GT3 (991) |
| 2016 | Porsche | 911 | GT3 (991) |
| 2016 | Porsche | 911 | GT3 RS (991) |
Why Choose Fabspeed?
- Over 30 years crafting Porsche-specific exhaust systems in Philadelphia USA
- Handmade T304 stainless steel components for exact fit and long-lasting performance
- Engineered for maximum flow and sound on 991 GT3 platforms with dyno-tested results
Frequently Asked Questions
-
Q: Will this fit both GT3 and GT3 RS models?
A: Yes fits all 2014-2016 Porsche 991 GT3 and 2016 GT3 RS with identical side muffler mounts -
Q: What material is used in construction?
A: 14-16 gauge T304 stainless steel tubing with helical valves for strength heat resistance and mirror polish finish -
Q: What warranty coverage is provided?
A: Lifetime warranty against structural defects welds and material failure when installed by certified shop
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Double-walled cardboard box 48 x 14 x 12 inches with foam protection
- Weight: Boxed weight 28 lbs
Fabspeed
Fabspeed exhaust systems and carbon fiber parts for Porsche, Ferrari, Lamborghini, and McLaren are stocked at Black Ops Auto Works. Shop cat-back exhaust systems, muffler bypass pipes, sport catalytic converters, downpipes, X-pipes, valve controllers, and carbon fiber trim for 911, 944, 964, 981, 991, and 992 chassis codes along with Ferrari 308, 328, 430, and 458 and Lamborghini Gallardo platforms. Every product is filterable by year, make, model, and chassis code so the correct part ships the first time. Black Ops Auto Works carries 761 Fabspeed SKUs across exhaust, carbon fiber, and exterior trim categories. What This Collection Covers Fabspeed Motorsport builds exhaust systems and carbon fiber components engineered for a narrow range of exotic and European sports car platforms rather than universal fitment. This collection groups Fabspeed parts by the exact Porsche chassis code, Ferrari model, or Lamborghini platform they were designed for. Platforms We Cover Fabspeed builds...
View Fabspeed Products
Porsche Parts & Accessories
Porsche parts and accessories for 911, Cayman, Boxster, 718, Macan, Cayenne, and Panamera models are stocked at Black Ops Auto Works. Shop exhaust systems, sport cats, downpipes, muffler bypass pipes, X-pipes, valve controllers, coilovers, sway bars, shocks and struts, brake pads, rotors, caliper rebuild kits, carbon fiber vents and trim, intake filters, cooling parts, drivetrain upgrades, and engine components for chassis codes 996, 997, 991, 992, 986, 987, 981, 982, 964, 993, 955, 957, 958, and 944 Turbo. Every product is filterable by year, make, model, chassis code, and trim so the correct part ships the first time. Black Ops Auto Works carries 1,407 Porsche SKUs across exhaust, suspension, brakes, exterior, cooling, and drivetrain categories. What This Collection Covers Porsche has produced distinct 911, Cayman, Boxster, Macan, Cayenne, and Panamera platforms across multiple chassis generations, and fitment does not carry over between them. This collection groups parts conf...
View Porsche Parts & Accessories Products