PORSCHE 99155657101 Interior Sound Absorber Insulation

( Manufacturer Part Number: 99155657101 ), ( Country Of Origin: Germany ), ( Location: Kb-051f )

Review PORSCHE 991 Interior Sound Absorber Insulation fits 911 2015

The **Porsche 991.5 (955.55) 2015 911 (991) Interior Sound Absorber Insulation Kit** is a meticulously engineered aftermarket solution designed to transform the driving and passenger experience in your Porsche 991 generation 911 by significantly reducing road and wind noise, engine vibrations, and cabin resonances. Crafted for enthusiasts seeking a quieter, more refined interior without compromising the sporty character of their vehicle, this high-performance insulation system is tailored specifically to the 2015 model year, ensuring a precise fit for the 991.5 s unique body structure and soundproofing requirements. The kit features a multi-layered approach, combining advanced **acoustic foam panels**, **butyl rubber sound deadening mats**, and **high-density fiberglass insulation** to target the most problematic noise sources whether it s the hum of highway tires, the drone of wind turbulence, or the subtle but intrusive vibrations transmitted through the body panels. Installed strategically in the **door panels, rear quarter panels, trunk, and under the dashboard**, the insulation creates a barrier that dampens sound waves before they enter the cabin, while the butyl mats absorb structural vibrations at their source, preventing them from resonating through the metal. Unlike generic soundproofing solutions, this kit is engineered to maintain the 911 s signature stiffness and rigidity, ensuring that the structural integrity of your Porsche remains uncompromised. The result is a cabin that retains its sporty, engaging feel while offering a noticeable reduction in noise pollution, allowing for clearer communication, improved audio system performance, and a more immersive driving experience whether cruising on the Autobahn or navigating tight corners. Ideal for both daily drivers and track-focused owners, this insulation kit is a subtle yet impactful modification that elevates comfort without detracting from the 911 s legendary driving dynamics.

### Pros and Cons of Buying a 2015 Porsche 911 (991.5) with Aftermarket Interior Sound Absorbers and Insulation

#### **Pros**

1. **Enhanced Driving Experience**

The addition of sound absorbers and insulation significantly reduces road and wind noise, creating a quieter cabin. This makes long drives more comfortable and less fatiguing, allowing for better focus on the road and the car s performance.

2. **Improved Sound Quality**

High-quality sound insulation can enhance the clarity of the car s stereo system, making audio reproduction richer and more immersive. This is particularly beneficial for enthusiasts who enjoy music or multimedia during drives.

3. **Reduced Vibrations and Road Noise**

The 911, especially in its base form, can transmit road vibrations and wind noise into the cabin. Insulation helps dampen these sensations, leading to a smoother and more refined ride, which is especially noticeable on highways or rougher roads.

4. **Increased Resale Value (If Done Professionally)**

If the sound insulation is installed by a reputable company using high-quality materials, it can be seen as a desirable modification that enhances the car s comfort and appeal to potential buyers. However, this is subjective and depends on the buyer s priorities.

5. **Protection of Interior Components**

Sound insulation materials can act as a secondary barrier against dust, debris, and minor impacts, potentially prolonging the life of the interior surfaces like the headliner, door panels, and seats.

6. **Customization and Personalization**

For owners who prioritize comfort and a refined driving experience, aftermarket sound insulation allows for a more tailored fit than stock Porsche interiors, which are often optimized for performance rather than noise reduction.

7. **Long-Term Comfort**

Over time, the cumulative effect of reduced noise and vibration can make the car feel more luxurious and less exhausting to drive, which is particularly valuable for those who use the car frequently for daily commuting or long trips.

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#### **Cons**

1. **Cost**

High-quality sound insulation and absorbers are not cheap. A professional installation for a 911 can range from $1,500 to $3,000 or more, depending on the materials used (e.g., Thinsulate, Kilmat, or custom-cut foam). DIY kits may be cheaper but often require significant labor and may not achieve the same level of effectiveness.

2. **Potential for Poor Installation**

If the insulation is not installed correctly, it can lead to a "boxy" or muffled sound quality, detracting from the car s sporty feel. Improper installation might also cause materials to shift or create unsightly bulges, especially in tight spaces like the door panels or trunk.

3. **Aesthetic Impact**

Some sound insulation materials, particularly thicker or bulkier options, can alter the appearance of the interior. For example, headliner insulation might make the cabin feel lower or more enclosed, and door panels might appear puffier. This can be a drawback for owners who prioritize the stock Porsche aesthetic.

4. **Potential for Moisture or Mold**

If the insulation materials are not breathable or if they trap moisture (e.g., from condensation), they can become a breeding ground for mold or mildew over time. This is particularly risky in areas like the trunk or under the seats, where humidity can accumulate.

5. **Reduced Accessibility for Maintenance**

Insulation can make it slightly more difficult to access certain components for maintenance or repairs. For example, reaching wiring harnesses, sensors, or interior trim might require removing insulation panels, adding extra time to service visits.

6. **Stock Feel vs. Modified Feel**

The Porsche 911 is renowned for its engaging, sporty driving dynamics, and some purists argue that excessive sound insulation can detract from the "open" and connected feel of the cabin. While this is subjective, it s worth considering if you value the raw driving experience over absolute silence.

7. **Warranty or Resale Concerns**

Aftermarket modifications, especially those involving the interior, can void certain manufacturer warranties or make the car less appealing to buyers who prefer stock configurations. While sound insulation is generally considered a cosmetic modification, some dealerships or appraisers may view it skeptically.

8. **Material Durability**

Some insulation materials, particularly cheaper or lower-quality options, can degrade over time due to heat, UV exposure (if installed in sun-exposed areas), or general wear. This may require reapplication or replacement after several years.

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### **Conclusion**

Buying a 2015 Porsche 911 (991.5) with aftermarket sound absorbers and insulation is a worthwhile investment if your priorities include comfort, reduced road noise, and an enhanced audio experience. The modification can transform the car into a more refined and relaxing vehicle, especially for daily driving or long trips. However, it is not a universal upgrade those who prioritize the stock Porsche feel, budget constraints, or the potential for aesthetic changes may find the drawbacks outweigh the benefits.

The key to a successful installation lies in choosing high-quality materials and working with a reputable installer who understands the nuances of the 911 s interior. If done correctly, the upgrade can add significant value to your driving experience without compromising the car s performance or character.

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### **Recommendation**

1. **Research Materials Thoroughly**

Opt for breathable, high-density materials like Thinsulate or Kilmat, which balance noise reduction with durability and minimal bulk. Avoid overly thick or rigid foams that could compromise the interior s look or feel.

2. **Choose a Professional Installer**

While DIY is possible, the 911 s complex interior geometry makes professional installation ideal. Look for companies with experience modifying Porsche models and request before-and-after examples of their work.

3. **Prioritize Key Areas**

Focus insulation on high-noise areas such as the doors, trunk, and under the headliner. The floor and dashboard may benefit less from insulation but can still contribute to overall comfort.

4. **Consider a Hybrid Approach**

If you re unsure about full insulation, start with a partial upgrade (e.g., just the doors or trunk) to assess the impact on noise reduction and aesthetics before committing to a full cabin treatment.

5. **Maintain the Interior**

Regularly check for moisture buildup, especially in the trunk or under seats, and ensure ventilation is adequate to prevent mold. Clean the insulation materials as needed to maintain their effectiveness.

6. **Document the Modification**

If you plan to sell the car in the future, clearly document the installation (photos, receipts, or a service log) to help potential buyers understand the benefits of the upgrade.

For most owners, the trade-offs are justified by the tangible improvements in comfort and sound quality. However, if you re a purist who values the 911 s raw driving dynamics or are on a tight budget, the modification may not be worth the cost. Ultimately, the decision should align with your personal preferences and how you intend to use the car.

Details:

Good condition. The quoted shipping prices are within the 48 states only. This listing is for: 2015 Porsche 911 991 Interior Sound Absorber Insulation Part number: 991.556.571.01, Used. Please see pictures for details.

part #: 99155657101 prices

• $24.00-$99.99

specifications universajoin:

• for models: 911
• for makes: Porsche
• for years: 2015
• mpn: 99155657101
• country of origin: Germany
• location: Kb-051f

seller universajoin:

• # reviews: 33476
• city: Ontario, California
• rating: 99.9%

shipping universajoin:

• type: Fixed
• cost: $14.00
• class: Standard
• service: Standard
• transit: 3-8 Days

general universajoin:

• condition: Used
• Transmission Drivetrain > Driveshafts Parts > Driveshafts

payments universajoin:

• wallet: Google-pay
• other
• credit card: Discover

offer universajoin:

• availability: In Stock
• best offers: True
• sold: 0
• quantity: 1
• options: Ship-to-home
• started: May 13, 2026

returns universajoin:

• policy: No Returns

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