PORSCHE 99611114111 Rear Muffler 333.PO1S03 2.7L

( Part Type: Muffler ), ( Conditions Options: 2.7l Auto Rwd ), ( Genuine Oem: Yes ), ( Ipn: 333.po1s03 ), ( Year: 2003 ), ( Descriptionpartcondition: 1997-2004 Porsche Boxster 996 2.7l Rear Muffler Assembly 99611114 )

Review PORSCHE 2.7l Rear Muffler Assembly fits BOXSTER 1997–2004

The **Porsche 996 Boxster 3.3 (996.1) 2.7L Rear Muffler (Part Number: 99611114111)** is a precision-engineered exhaust component designed exclusively for the iconic Porsche Boxster 996 generation, specifically the 2.7-liter naturally aspirated models produced between 1997 and 2004. This rear muffler is a critical element of the vehicle s exhaust system, playing a dual role in both performance and refinement. Crafted from high-grade stainless steel, it is built to withstand the rigorous demands of Porsche s high-revving engines while maintaining structural integrity under extreme temperatures and vibrations. The muffler s design incorporates a smooth, tapered exhaust flow path, optimized to minimize backpressure and maximize throttle response, ensuring that the Boxster s 2.7-liter flat-six delivers its characteristic growl with clarity and precision. Beyond its performance benefits, this muffler is engineered to reduce noise levels while preserving the deep, resonant tone that defines Porsche s signature exhaust note a balance between sporty aggression and refined elegance. The part is a direct-fit replacement, designed to seamlessly integrate with the 996 Boxster s exhaust manifold and catalytic converter, adhering to Porsche s exacting standards for fitment and functionality. Whether installed as part of a full exhaust upgrade or as a standalone component to address wear and tear, this muffler ensures that the Boxster s exhaust system operates with efficiency, durability, and the unmistakable character that Porsche enthusiasts expect. Its robust construction and attention to detail make it an essential upgrade for owners seeking to maintain or enhance their vehicle s performance, reliability, and timeless appeal.

### **Pros and Cons of Buying a Porsche Boxster 996 (2.7L, 1997 2004, Rear Muffler 99611114111)**

#### **Pros**

1. **Performance and Driving Experience**

The 2.7L flat-six engine in the 996 Boxster (especially the S models) delivers strong performance with a naturally aspirated, high-revving sound that enthusiasts appreciate. The rear-wheel-drive layout and lightweight construction provide engaging handling, making it a joy to drive on twisty roads.

2. **Classic Porsche Design**

The 996 Boxster has a distinctive, angular design that stands out from later models. Its retro styling, combined with modern engineering, gives it a unique character. The convertible top (if in good condition) adds to its appeal for those who enjoy open-air driving.

3. **Reliability (Compared to Earlier Models)**

While not as bulletproof as later 986 or 987 models, the 996 Boxster (especially the later years of production) is generally more refined and reliable than the early 996s. The 2.7L engine is robust if maintained properly, and common issues like oil leaks or suspension wear can be mitigated with regular servicing.

4. **Modding Potential**

The 996 platform is highly modifiable. Aftermarket support includes performance upgrades (intake, exhaust, ECU tuning), cosmetic enhancements (body kits, wheels), and interior customization. The rear muffler (99611114111) is a common upgrade for those seeking a deeper, sportier exhaust note.

5. **Resale Value (For Well-Maintained Examples)**

A properly maintained 996 Boxster holds its value better than many sports cars of its era. The S models (especially the 2002 2004 facelifts) are particularly sought after by collectors, making them a solid long-term investment if cared for.

6. **Convertible Practicality**

Unlike some older Porsche convertibles, the 996 Boxster has a reasonably sturdy top that, when in good condition, provides decent weather protection. The rear seats are also usable (though tight), making it more practical than some rivals.

7. **Community and Support**

The Porsche 996 has a strong enthusiast community with readily available parts, forums (like Porsche996.com), and tuners. This makes troubleshooting and modifications easier compared to rarer models.

---

#### **Cons**

1. **Common Mechanical Issues**

- **Oil Leaks:** The 2.7L engine is prone to oil leaks from the valve cover gasket, rear main seal, and oil filter housing gasket. These require regular inspection and replacement.

- **Suspension Wear:** The 996 s suspension (especially the rear) can wear out quickly, leading to clunking noises and poor handling. Bushings, shocks, and control arms are common wear items.

- **Electrical Gremlins:** Early 996s had reliability issues with the electrical system, including faulty sensors and wiring harnesses. Later models improved but still require vigilance.

- **Convertible Top Problems:** The soft top can degrade over time, leading to leaks, stiff operation, or complete failure. Replacement tops are expensive.

2. **Rust and Corrosion**

The 996 was not as rust-resistant as later Porsches. Pay close attention to the wheel arches, sills, and undercarriage. A rust inspection is critical before purchase.

3. **Aging Interior**

The interior materials (plastic trim, cloth upholstery) show wear over time. While functional, it lacks the premium feel of later models. The 2002 facelift improved some plastics, but early examples can feel dated.

4. **Fuel Economy**

The 2.7L engine is thirsty, especially in sport mode. Expect around **12 15 MPG (city/highway)** not terrible for a sports car, but higher-end models (like the Turbo) will drink even more.

5. **Maintenance Costs**

While not as expensive as a 911, the 996 Boxster requires regular upkeep. Labor costs can add up, and some parts (especially for the convertible top or suspension) are not cheap.

6. **Depreciation**

The 996 has depreciated significantly since its peak. While S models hold value better, a standard 2.7L Boxster may not be as lucrative to sell later unless it s in pristine condition.

7. **Noise and Vibration**

The cabin can be noisy at highway speeds, and the engine s revving nature means you ll hear it clearly. Wind noise with the top down is also noticeable.

8. **Limited Aftermarket Parts for Some Components**

While the 996 has strong aftermarket support, some parts (like rare suspension components or specific wiring harnesses) can be harder to source than in newer models.

---

### **Conclusion and Recommendation**

The **Porsche Boxster 996 (2.7L, 1997 2004)** is a fantastic choice for enthusiasts who appreciate classic Porsche styling, engaging driving dynamics, and the potential for customization. It strikes a balance between performance, practicality, and modding potential, making it a favorite among collectors and daily drivers alike.

**However, it is not without its challenges.** Buyers must be prepared for potential mechanical issues (especially oil leaks and suspension wear), higher maintenance costs, and the need for vigilant upkeep particularly with the convertible top and rust-prone areas. A well-documented history, recent service records, and a thorough pre-purchase inspection are **essential** to avoid costly surprises.

#### **Who Should Buy It?**

- **Enthusiasts** who want a fun, rear-wheel-drive sports car with Porsche heritage.

- **Modifiers** who enjoy working on their car and customizing it.

- **Collectors** targeting a specific model year (especially 2002 2004 facelifts).

- **Budget-conscious buyers** who prioritize driving experience over luxury.

#### **Who Should Avoid It?**

- **Those seeking a set-and-forget car** the 996 requires regular maintenance.

- **Buyers who dislike oil leaks or electrical quirks** these are common but manageable with care.

- **Those who want a daily driver with minimal hassle** a later 987 Boxster or a used BMW Z4 might be more practical.

- **People who prioritize fuel efficiency** the 2.7L is not as economical as modern hybrids or turbocharged engines.

If you find a **well-maintained 996 Boxster (2.7L) with a clean service history, no major rust, and a functional convertible top**, it is an excellent purchase. Focus on **later model years (2002 2004)**, as they benefited from minor refinements and are more reliable. Budget for **regular oil changes, suspension checks, and top maintenance** to keep it running smoothly.

- **A 2002 2004 facelift model** (improved interior, minor mechanical tweaks).

- **A low-mileage example** (under 60,000 miles) with a **Porsche service log**.

- **A used rear muffler (99611114111) upgrade** if you want a sportier exhaust note.

If you re willing to put in the effort, the 996 Boxster offers an unmatched blend of **Porsche purity, driving excitement, and modding potential** making it one of the best choices in its class. Just be prepared for the occasional battle with its quirks.

Details:

Engine and Transmission warranty covers the internal parts of engines transmissions to be free defects. Mazda Nissan Heaven. Fort Worth, TX 76140. SHIPPING: Shipping is only for the lower 48 states.

6711 Oak Crest Dr E.

part #: 99611114111 prices

• $348.49-$449.00

specifications emissyste:

• for models: Boxster
• for makes: Porsche
• for years: 1997-2004
• part type: Muffler
• conditions options: 2.7l Auto Rwd
• genuine oem: Yes
• ipn: 333.po1s03
• year: 2003
• descriptionpartcondition: 1997-2004 Porsche Boxster 996 2.7l Rear Muffler Assembly 99611114

shipping emissyste:

payments emissyste:

• other
• cash
• credit card: Diners-club
• wallet: Apple-pay

general emissyste:

• Car Truck Parts Accessories > Exhaust Emission Systems > Mufflers Resonators
• condition: Used

returns emissyste:

• policy: Returns Accepted
• time: 60 Days
• paid by: Seller

offer emissyste:

• quantity: 1
• sold: 0
• availability: In Stock
• best offers: True
• options: Seller-arranged-local-pickup
• started: March 12, 2026

seller emissyste:

• # reviews: 10299
• city: Fort Worth, Texas
• rating: 99.7%

Porsche 99611114111 Is Similar To:

• 2245 Porsche Boxster Oem Evap Charcoal Canister (30.2% similar) ...(January 2nd, 2019)
• 225 43150 001 Wd Express Vacuum Pump Fits Porsche Boxster (22.1% similar) This part fits vehicles made in the following years 2009 , 2010 , 2011 , 2012 , 2013 , 2014 , our team of certified car quest counter pros are Best biz...(May 9th, 2018)
• 225 43151 001 Wd Express Vacuum Pump Fits Porsche Boxster (22.1% similar) Our team of certified car quest counter pros are Best in the biz. You won't be disappointed. So forget the rest and try Best...(May 9th, 2018)
• 94411042900 Porsche Vacuum Control Bleeder Valve Assembly Oem (38.6% similar) Please verify that this fits your vehicle before purchasing. Comes only with what you see pictured please look at the photos carefully to determine exact physical condition of items being sold. Feel free to make an offer. In this case, the serial number for particular item is Moho. This item is in ...(April 13th, 2019)
• 06-08 987-107-926-00 98710792600 Genuine Porsche New Boxster Cayman Oil Separator High Performance Version (28.1% similar) New porsche boxster Cayman oil separator high performance version genuine also use vent line, vent line, bolts this listing is for oil separator only. Or for a quick response. If you live outside of the USA please research and verify it fits your vehicle before purchasing...(November 30th, 2016)
• 97-04 43022 Wd Express Vapor Canister Vent Hose-genuine Fits Porsche Boxster (19.4% similar) Substituted parts of same or better quality will not be deemed our fault. The bags are clear so you can view and inspect the item. As in the parts does not match the picture or the wrong parts was shipped including items deemed incorrectly boxed...(November 10th, 2016)
• Vw Audi Porsche 059131512ar Cooler Assembly Exhaust Gas (40% similar) VW/Audi/porsche 059131512AR cooler assembly. Exhaust gas. Part number: 059131512AR. Cooler assembly. Exhaust gas re circulation erg cooler. 2010 -12 3.0 liter diesel. 3.0 liter engine components. New condition...(July 27th, 2022)
• Porsche 98711104103 06-08 Cayman 987c 987 Rear Exhaust Silencer Muffler Support Bracket Oem (40% similar) Here to see. All electronics are tested before removed from vehicle. Item may show light scuffs, scratches or other imperfections as a result of this being used part. All the parts are tested either before or after removal from vehicle...(September 19th, 2023)
• Porsche 336-50152 Air Flow Meter Fits 09-12 Boxster (32.3% similar) 6701S 78TH st. Porsche boxster 09-12. Our hours are. River view, fl 33569...(September 26th, 2023)
• Porsche 333.po1x03 03 911 996 Carrera 3.6l Rear Exhaust Muffler Set Pair (57% similar) Beige Be gold geld silver Sol. Black balk gray Gary tan tan. Blue Blu green gran teal tea. Brown Bran purple pour yellow yell. Parts are sold strictly as replacement parts only. Bronze BR maroon men white what...(October 12th, 2023)
• Genuine 99611012906 For Porsche Boxster 1997-2004 Vapor Canister Purge Valve (40% similar) Designed to meet your specific needs. Features: made with precision and quality in mind. This genuine product is your cost-effective alternative to pricey parts from local dealer. Manufactured to meet or exceed strict quality requirements. Vapor canister purge valve phone hidden by genuine. Restore ...(December 24th, 2023)