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Porsche Boxster S Rear Exhaust System, Muffler (Round Tips) #FPOR-0955


Product Details

Porsche Boxster S Rear Exhaust System, Muffler (Round Tips) #FPOR-0955

Billy Boat Exhaust offers a complete kit for your Porsche Boxster which includes headers and a muffler system, which are also sold individually. Built by using T304 Stainless Steel, the exhaust system for the Boxster not only adds a guaranteed lifetime of performance, it emits a rich, crisp sounding exhaust note more complimenting to this sporty roadster. Twin 3″ Round, Double Wall Tips are fully polished and improve the look of your Porsche.

  • 3″ Twin ROUND Double-Wall Tips.
  • Mandrel bent from the highest-grade T-304 stainless steel.
  • Designed, tested, and manufactured to the finest hand-made integrity found in any exhaust system.
  • Limited Lifetime Warranty
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Lifetime Warranty

Have more questions? Contact us!

The Magnuson-Moss Warranty Act makes it illegal for companies to void your warranty or deny coverage under the warranty simply because you used an aftermarket part. READ MORE…

product image WARNING: This product in the physical form it is sold does not present a hazard. However, operations including, but not limited to welding, brazing, or thermal cutting can expose you to chemicals including Chromium, Nickel, Cobalt, Arsenic, Cadmium and Lead which are known to the State Of California to cause cancer, birth defects and other reproductive harm. For more information go to www.P65Warnings.ca.gov

Download PDF here… FPOR0955



Thanks for choosing Billy Boat Exhaust for your Porsche Boxster.  This high-performance exhaust system is absolutely state-of-the-art, employing the finest materials and craftsmanship available.  Installation is a direct replacement of the factory equipment and shouldn’t take much more than two hours to perform.  If you have questions regarding installation, please call our Toll-Free Tech Line: 888-228-7435.


Metric socket set

Metric combination wrench set

Hydraulic jack and jack stands

Pry bar


Factory exhaust manifold gasket kit

Heavy-duty zip ties



  1. Lift rear of car and support in appropriate locations with jack stands (consult owner’s manual), set emergency brake and chock wheels.
  2. Remove underside splash guard paneling to access exhaust system. Note factory mounting configuration: sleeves at the catalyst, plus five mounting points of “hangers.’ Installation of the Billy Boat Exhaust muffler is simply the inverse.
  3. Begin to remove the factory system after the catalytic converters. You may need to remove the factory heat shield to better access some of the hardware. After all hardware is removed work the muffler off of the catalytic converters, being sure not to let the muffler drop on you. It’s heavy! Carefully use a pry bar to assist in removal where binding. It may also help to saturate mounting points with WD-40 to penetrate corrosion.
  4. With the factory exhaust system removed, begin to install the Billy Boat Exhaust unit. Install one side of the muffler at a time working the sleeved end onto the catalytic converter first and working back, leaving all mounting hardware finger tight. Use the existing 8mm bolt and supplied 8mm lock nut to attach the Billy Boat Exhaust muffler to the vehicle. Adjust the muffler for the best fit and tighten the mounting hardware to factory torque specifications, always working from the cat back to the tips.
  5. Start the car and listen for any exhaust leaks or rattles. After ensuring that there are no leaks or rattles go for a drive and listen for rattles over rough surfaces.  After 500 miles re-torque your work to ensure all mounts are secure.
  6. Take a drive and enjoy your work and new Billy Boat Exhaust system. To keep the exhaust system clean use Simple Green or other natural solvents to clean off road debris.

Billy Boat Exhaust Safety, Installation and Liability Statements

SAFETY: Appropriate disassembly, assembly methods and procedures are essential to ensure the personal safety of the individual performing the kit installation. Improper installation due to the failure to correctly follow these instructions could cause personal injury or death. Read each step of the installation manual carefully before starting the installation.

  • Always wear safety glasses for eye protection.
  • Place the ignition switch in the OFF position.
  • Always apply the parking brake when working on the vehicle.
  • Block the front and rear tire surfaces to prevent unexpected vehicle movement.
  • Operate the engine only in well-ventilated areas to avoid exposure to carbon monoxide.
  • Do not smoke or use flammable items near or around the fuel system.
  • Use chemicals and cleaners only in well-ventilated areas.
  • Batteries can produce explosive hydrogen gas which can cause personal injury. Do not allow flames, sparks or flammable sources to come near the battery.
  • Keep hands and any other objects away from the radiator fan blades.
  • Keep yourself and your clothing away from moving parts when the engine is running.
  • Do not wear loose clothing or jewelry that can be caught in rotating or moving parts.

VEHICLE SUPPORT WARNING: Should the purchaser decide to install this exhaust product at home, be warned that car or light duty truck/van “bumper” jacks are intended for emergency use only. The use of frame contact jack stands in conjunction with a floor jack as main support is highly recommended to minimize accidental dropping of a vehicle while the installation proceeds. We recommend the use of a shop hoist if possible. Please use caution!

GENERAL STATEMENT OF LIABILITY: While we provide information for do-it-yourself installation of exhaust systems and related items, these operations are not without risk. Injury may occur during an installation or exhaust systems and their components may be damaged in the process. We are not responsible or liable for damages that may be sustained to persons or property during an installation. For this reason, we recommend professional installation as the best option when at all possible. While care has been taken in the preparation of the information contained in this web site, Billy Boat Exhaust and BillyBoatExhaust.com does not and cannot guarantee its accuracy. Anyone accessing this information does so at their own risk. It will be assumed that access indemnifies Billy Boat Exhaust and BillyBoatExhaust.com from any and all injury or damage arising from such use.

LOCAL LAWS & LIMITATION OF LIABILITY/DISCLAIMERS: Local Laws & Limitation of Liability/Disclaimers: The regulation of emissions production, noise levels and safety standards is undertaken by the federal government, each of the fifty state legislatures, and by many local municipalities, towns and counties. The manufacturer makes no warranties of merchantability, of fitness for a particular purpose, or that its products are approved for general use, or that its products comply with laws, regulations or ordinances in the states where they may be sold to the ultimate purchaser, the consumer. The entire risk as to the conformity of this product in any such state and as to repair, should the product prove to be defective or non-conforming, is on the retail purchaser, the buyer, the ultimate consumer of such product and it is not upon the seller, distributor, or manufacturer. In this connection, retail purchaser, the buyer, the ultimate consumer assumes the burden of the entire cost of any and all necessary service, alterations, and or repair. The foregoing statement limits the liability of the manufacturer.

If you have any questions please feel free to give us a call. Our direct line to the sales departments is 1-888-228-7435, ext 18. We are in Phoenix, AZ and can be reached 8am-5pm. Should you have questions that images would help explain, please email Mike at mike@bbexhaust.com.

*Please note, we do not follow daylight savings time if you are contacting us outside of Arizona.

We try to put as much information as possible within our product pages to help with application choice and the installation process. The business you purchased our product from can be a wealth of information, but should you need additional help and information, please feel free to call or our sales department.

Monday-Friday 8:30am-5:00pm Arizona time.
888-228-7435 x18 or 623-581-7600 x18

*Note that Arizona does not follow Daylight Savings Time.

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