Are the Fabspeed Muffler Bypass Pipes suitable for daily street driving?

Not really. Fabspeed describes this system as very loud and aggressive, since it replaces the factory mufflers entirely with straight-through tubing. It's built for track and enthusiast use. Drivers who want a similar upgrade with a more livable daily sound should look at the Maxflo Performance Exhaust or the Supercup Exhaust System instead.

Does this fit the Porsche 911 Carrera 4 and Carrera 4S?

Yes. The Fabspeed Muffler Bypass Pipes for 996 Porsche models fit the Carrera, Carrera 4, and Carrera 4S across the 996 platform, spanning both the 3.4-liter and 3.6-liter engines depending on model year. Check the Applications section above for the exact year range for each model.

Will installation require any cutting or welding?

No. Installation is a simple DIY bolt-on job; the Muffler Bypass Pipes mount in place of the factory mufflers with no cutting, welding, or fabrication needed. Most installers complete the swap with basic hand tools in under an hour.

What are the Fabspeed Muffler Bypass Pipes made from?

The Fabspeed Muffler Bypass Pipes for 996 Porsche models are constructed from mandrel-bent T304L stainless steel, the same grade Fabspeed uses across its performance exhaust line. Mandrel bending keeps the tubing's internal diameter consistent through every bend, preserving exhaust flow instead of restricting it.

How much weight do the Muffler Bypass Pipes save?

The Muffler Bypass Pipes cut more than 35 lbs from the rear of the vehicle compared to the factory mufflers. Combined with 23 whp and 45 ft-lbs of added power, it's a meaningful change in both feel and numbers, especially noticeable in a car this size.

What's the difference between the Muffler Bypass Pipes and the Supercup Exhaust System?

The Muffler Bypass Pipes remove the mufflers entirely for the loudest, most track-focused sound and maximum weight savings. The Supercup Exhaust System is built for a similarly aggressive tone but in a more street-friendly package. Choose the Muffler Bypass Pipes for dedicated track use, and the Supercup system for a car that still sees regular street time.

Description

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Description

Fabspeed Muffler Bypass Pipes for 996 Porsche 911 Carrera / 4 / 4S

Fabspeed’s Muffler Bypass Pipes for 996 Porsche models replace the heavy factory mufflers with straight-through tubing for a loud, aggressive Supercup-style exhaust note. The system sheds significant weight from the rear of the car and is popular with Rolex Grand-Am race teams, PCA/POC members, and HPDE drivers. Because the sound is loud and track-oriented, street drivers who want a more subtle, daily-drivable upgrade should look at the Maxflo Performance Exhaust or the Supercup Exhaust System instead.

Features

Adds 23 whp and 45 ft-lbs, carried throughout the rpm range
Cuts over 35 lbs from the rear of the vehicle
Delivers an aggressive, Supercup-style exhaust note
Constructed from mandrel-bent T304L stainless steel
Level-1 install difficulty; simple DIY bolt-on with no cutting or welding required
Backed by the Fabspeed lifetime warranty

Applications

Porsche 911 Carrera: 996 | 1998-2004 | 3.4L F6, 3.6L F6
Porsche 911 Carrera 4: 996 | 1998-2004 | 3.4L F6, 3.6L F6
Porsche 911 Carrera 4S: 996 | 2002-2004 | 3.6L F6

Notes

All Fabspeed products are expected to ship within one week of order, though timelines are often much quicker

Frequently Asked Questions

Are the Fabspeed Muffler Bypass Pipes suitable for daily street driving? Not really. Fabspeed describes this system as very loud and aggressive, since it replaces the factory mufflers entirely with straight-through tubing. It’s built for track and enthusiast use. Drivers who want a similar upgrade with a more livable daily sound should look at the Maxflo Performance Exhaust or the Supercup Exhaust System instead.
Does this fit the Porsche 911 Carrera 4 and Carrera 4S? Yes. The Fabspeed Muffler Bypass Pipes for 996 Porsche models fit the Carrera, Carrera 4, and Carrera 4S across the 996 platform, spanning both the 3.4-liter and 3.6-liter engines depending on model year. Check the Applications section above for the exact year range for each model.
Will installation require any cutting or welding? No. Installation is a simple DIY bolt-on job; the Muffler Bypass Pipes mount in place of the factory mufflers with no cutting, welding, or fabrication needed. Most installers complete the swap with basic hand tools in under an hour.
What are the Fabspeed Muffler Bypass Pipes made from? The Fabspeed Muffler Bypass Pipes for 996 Porsche models are constructed from mandrel-bent T304L stainless steel, the same grade Fabspeed uses across its performance exhaust line. Mandrel bending keeps the tubing’s internal diameter consistent through every bend, preserving exhaust flow instead of restricting it.
How much weight do the Muffler Bypass Pipes save? The Muffler Bypass Pipes cut more than 35 lbs from the rear of the vehicle compared to the factory mufflers. Combined with 23 whp and 45 ft-lbs of added power, it’s a meaningful change in both feel and numbers, especially noticeable in a car this size.
What’s the difference between the Muffler Bypass Pipes and the Supercup Exhaust System? The Muffler Bypass Pipes remove the mufflers entirely for the loudest, most track-focused sound and maximum weight savings. The Supercup Exhaust System is built for a similarly aggressive tone but in a more street-friendly package. Choose the Muffler Bypass Pipes for dedicated track use, and the Supercup system for a car that still sees regular street time.

About Fabspeed

Fabspeed Motorsport is situated in Fort Washington, Pennsylvania, within the United States of America. Their extensive 26,000 sqft. facility serves as a hub for various car clubs, including Porsche Club of America, Ferrari, McLaren, Lamborghini, and more. The company is renowned for its comprehensive approach to product development. They handle the entire process, from design and engineering to dyno testing, street trials, and racing assessments, ensuring the quality and performance of every item. Fabspeed also collaborates closely with race engine builders and tuners hailing from Italy, Germany, and the United States, resulting in the creation of the Ultimate Performance parts. To cater to their passionate global audience, Fabspeed meticulously crafts systems using aerospace-grade austenitic stainless steel, titanium, and carbon fiber materials, setting a standard for excellence in the industry.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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