Will the Fabspeed Secondary Muffler Bypass for 964 fit my Porsche 911 Carrera?

Yes. The Secondary Muffler Bypass for 964 fits every 964 Carrera built from 1989 to 1994, including the Carrera 2, Carrera 4, RS America, Speedster, Carrera RS and Carrera Cup, with 3.6 or 3.8 liter engines running the factory 964-style rear exhaust. It is a direct replacement for the OEM 964 secondary muffler, so nothing is cut or modified to fit it.

How much weight does the Fabspeed pipe save, and where does it come off?

Twenty-five pounds, or 11.4 kg, come off the right rear corner of the car, directly behind the right rear wheel. That is the worst place on a 911 to carry mass, so the change shows up in turn-in, in how quickly the rear settles, and in acceleration. The straight-through pipe weighs a fraction of the factory muffler it replaces.

How much louder is the car with this pipe fitted?

Noticeably fuller and harder edged, though Fabspeed does not publish a decibel figure for this part. The car keeps the rest of its factory 964 exhaust, so the result is a stronger flat-six voice under throttle rather than a full race exhaust. Owners who want more can add the primary muffler bypass alongside it.

Is the Fabspeed secondary muffler bypass street legal?

Yes. Fabspeed states the pipe is 100% EPA and CARB compliant. It replaces a muffler, not emissions hardware, so the car's emissions equipment is untouched. Local noise ordinances still apply and vary by state and municipality, so check the rules where the car is driven and inspected before fitting it.

How difficult is the installation?

Level-1. The pipe reuses the factory 964 donuts and clamps and needs no cutting or welding, so it bolts in with hand tools on a lift or on stands. Budget the time you would give any exhaust clamp job, and plan to replace any factory donut that is crushed, hardened or leaking while the system is apart.

What is the difference between the primary and secondary muffler bypass for the 964?

They replace different parts of the same system. The primary muffler bypass replaces the center muffler, and the secondary muffler bypass replaces the right-side rear muffler that carries most of the weight. Each is sold separately and either can be fitted on its own; running both gives the largest weight saving and the loudest result.

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Description

Fabspeed Secondary Muffler Bypass for 964 Porsche 911 Carrera

Fabspeed’s Secondary Muffler Bypass for 964 Porsche 911 Carrera answers the question every 964 owner eventually asks: how much better does this car feel with the dead weight taken out of it? Porsche Motorsport developed this pipe for the Carrera Cup cars that raced from 1990 to 1993, and Fabspeed replicates it in Fort Washington, Pennsylvania, on the same straight-through principle. Twenty-five pounds leave the right rear corner, a restriction leaves the exhaust path, and the flat-six gains the harder, more urgent voice the Cup cars were known for. For an air-cooled 911 kept for the way it drives, few changes of this size do this much.

Bolt-On and Go

The Secondary Muffler Bypass for 964 Porsche 911 Carrera goes in with hand tools, reusing the factory 964 donuts and clamps, with no cutting and no welding, and it comes back out just as easily if the car is ever returned to stock. The pipe exits in the factory position, so owners can keep the original right-side tip or fit the Fabspeed Deluxe Oval Style Right-Side Tip (FS.POR.964.SROTP) in the same afternoon.

Features

Straight-through replacement for the factory 964 secondary muffler, 25 pounds (11.4 kg) lighter than the OEM unit
Weight comes off the right rear corner, where it does the most damage to turn-in and traction
Replica of the Porsche Motorsport pipe fitted to the 964 Carrera Cup cars
CNC mandrel-bent 3.0 inch (76mm) T304L stainless steel tubing, 14-16 gauge, TIG welded
Frees throttle response and power by taking a restriction out of the rear of the system
100% EPA and CARB compliant
Reuses the factory 964 donuts and clamps, Level-1 install difficulty
Backed by the Fabspeed lifetime warranty

Applications

Porsche 911 Carrera 2: 964 | 1990-1994 | 3.6L F6
Porsche 911 Carrera 4: 964 | 1989-1994 | 3.6L F6
Porsche 911 Carrera Cup: 964 | 1990-1993 | 3.6L F6
Porsche 911 Carrera RS: 964 | 1992-1993 | 3.6L F6
Porsche 911 RS America: 964 | 1993-1994 | 3.6L F6
Porsche 911 Speedster: 964 | 1993-1994 | 3.6L F6

Notes

Fits 964 engines of 3.6 and 3.8 liters running the factory 964-style rear exhaust
Direct replacement for the OEM 964 secondary muffler and the 965 C2 Turbo secondary muffler
The Fabspeed Sound Solutions warranty does not apply to this part
Keep the factory right-side tip or pair the pipe with the Fabspeed Deluxe Oval Style Right-Side Tip (FS.POR.964.SROTP)
To do the center muffler at the same time, add the Fabspeed Primary Muffler Bypass for 964 Porsche 911 Carrera (FS.POR.964.PMB)
All Fabspeed products are expected to ship within one week of order, and timelines are often much quicker

Frequently Asked Questions

Will the Fabspeed Secondary Muffler Bypass for 964 fit my Porsche 911 Carrera? Yes. The Secondary Muffler Bypass for 964 fits every 964 Carrera built from 1989 to 1994, including the Carrera 2, Carrera 4, RS America, Speedster, Carrera RS and Carrera Cup, with 3.6 or 3.8 liter engines running the factory 964-style rear exhaust. It is a direct replacement for the OEM 964 secondary muffler, so nothing is cut or modified to fit it.
How much weight does the Fabspeed pipe save, and where does it come off? Twenty-five pounds, or 11.4 kg, come off the right rear corner of the car, directly behind the right rear wheel. That is the worst place on a 911 to carry mass, so the change shows up in turn-in, in how quickly the rear settles, and in acceleration. The straight-through pipe weighs a fraction of the factory muffler it replaces.
How much louder is the car with this pipe fitted? Noticeably fuller and harder edged, though Fabspeed does not publish a decibel figure for this part. The car keeps the rest of its factory 964 exhaust, so the result is a stronger flat-six voice under throttle rather than a full race exhaust. Owners who want more can add the primary muffler bypass alongside it.
Is the Fabspeed secondary muffler bypass street legal? Yes. Fabspeed states the pipe is 100% EPA and CARB compliant. It replaces a muffler, not emissions hardware, so the car’s emissions equipment is untouched. Local noise ordinances still apply and vary by state and municipality, so check the rules where the car is driven and inspected before fitting it.
How difficult is the installation? Level-1. The pipe reuses the factory 964 donuts and clamps and needs no cutting or welding, so it bolts in with hand tools on a lift or on stands. Budget the time you would give any exhaust clamp job, and plan to replace any factory donut that is crushed, hardened or leaking while the system is apart.
What is the difference between the primary and secondary muffler bypass for the 964? They replace different parts of the same system. The primary muffler bypass replaces the center muffler, and the secondary muffler bypass replaces the right-side rear muffler that carries most of the weight. Each is sold separately and either can be fitted on its own; running both gives the largest weight saving and the loudest result.

About Fabspeed

Fabspeed Motorsport builds its exhaust hardware in Fort Washington, Pennsylvania, out of a 26,000 square foot facility that doubles as a gathering point for the Porsche Club of America, Ferrari, McLaren and Lamborghini clubs. Every product is designed, engineered, dyno tested, street driven and raced in-house rather than farmed out, and the company works directly with race engine builders and tuners in Italy, Germany and the United States. Systems are fabricated from aerospace-grade austenitic stainless steel, titanium and carbon fiber, and every Fabspeed performance part carries the company’s lifetime warranty.

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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Fabspeed Secondary Muffler Bypass for 964 Porsche 911 Carrera / 4 / RS America / Speedster [FS.POR.964.SMB]

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Fabspeed Secondary Muffler Bypass for 964 Porsche 911 Carrera

Bolt-On and Go

Features

Applications

Notes

Frequently Asked Questions

Reviews