GERMAN 91DWWXX31 Exhaust Manifold Bolt

( Brand: German ), ( Type: Exhaust Manifold Bolt ), ( Manufacturer Part Number: 91DWWXX31 ), ( Fits 1: 1997-2004 Porsche Boxster ), ( Fits 2: 1999-2005 Porsche 911 ), ( Fit Note: Exhaust Bolt Manifold To Catalyst ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Please Read All Notes To Confirm Fitment ), ( Cs-sku: 400 )

Review GERMAN 91dwwx31 Exhaust Manifold Bolt fits BOXSTER 911 1997–2002

Exhaust Manifold Bolt for Porsche Boxster and 911 (91dwwxx31) (Fits: 1997, 1998, 1999, 2000, 2001, and 2002 Models)

This exhaust manifold bolt, with part number 91dwwxx31, is a crucial component for the maintenance and repair of select Porsche models, including the Boxster and 911. Manufactured to meet the highest standards of quality, this fastener is specifically designed for Porsche vehicles manufactured between 1997 and 2002.

The bolt is made from premium materials, ensuring durability and strength. Its hexagonal head allows for easy installation and removal using standard socket tools. Its threaded length is engineered to provide a secure connection between the exhaust manifold and engine block, ensuring optimal engine performance.

This exhaust manifold bolt is essential for maintaining the structural integrity of the exhaust system in your Porsche. Over time, the original bolt may wear out, loosen, or even break, leading to potential exhaust leaks or other issues. By using a replacement like this one, you can ensure that your vehicle continues to run smoothly and efficiently.

Installing this bolt is a straightforward process. First, remove the old bolt using a socket wrench and extension. Then, clean the threaded area and apply a thread sealant to prevent leaks. Finally, install the new 91dwwxx31 exhaust manifold bolt, ensuring it is securely tightened to the specified torque.

By choosing this exhaust manifold bolt for your Porsche Boxster or 911, you can enjoy peace of mind, knowing that you've invested in a high-quality replacement part from a trusted supplier. This bolt is a crucial component for maintaining the reliability and performance of your vehicle, and its precision fit ensures a seamless integration into your Porsche's exhaust system.

In summary, this exhaust manifold bolt, with part number 91dwwxx31, is a vital replacement component for Porsche Boxster and 911 models from 1997 to 2002. Manufactured from premium materials, it ensures a secure connection between the exhaust manifold and engine block, maintaining optimal engine performance and structural integrity. Installing this bolt is a straightforward process, and its precision fit guarantees seamless integration into your Porsche's exhaust system.

Buying a new exhaust manifold bolt (part number 91dwwxx31) for a Porsche Boxster or 911 model year between 1997 and 2002 may be necessary due to wear or damage. Here are some potential pros and cons of purchasing a new one.

1. Improved Performance: A new exhaust manifold bolt can help ensure a proper seal between the exhaust manifold and the cylinder head. This can lead to improved engine performance, including increased power and torque.

2. Reduced Emissions: A leaking exhaust manifold bolt can cause excessive exhaust gases to escape before they are properly processed by the catalytic converter. A new bolt can help reduce emissions and improve fuel efficiency.

3. Safety: A faulty exhaust manifold bolt can pose a safety risk, particularly in the event of a high-speed accident. A new bolt can help ensure that the exhaust system stays securely attached to the vehicle.

1. Cost: A new exhaust manifold bolt for a Porsche Boxster or 911 can be an expensive repair. The cost will depend on the specific make and model of the vehicle, as well as the location of the repair shop.

2. Installation: Installing a new exhaust manifold bolt can be a complex and time-consuming process. It may require specialized tools and expertise, and may involve removing other components of the exhaust system.

3. Availability: Depending on the specific make and model of the vehicle, it may be difficult to find a new exhaust manifold bolt. Some repair shops may only carry aftermarket parts, which may not be of the same quality as OEM parts.

A new exhaust manifold bolt (part number 91dwwxx31) can offer several benefits for Porsche Boxster and 911 models from 1997 to 2002, including improved performance, reduced emissions, and increased safety. However, the cost, installation complexity, and availability of the part may make it a less attractive option for some vehicle owners. Ultimately, the decision to purchase a new exhaust manifold bolt will depend on the individual's priorities and budget.

If you are experiencing issues with your exhaust manifold bolt and are concerned about the potential risks, it may be worth considering investing in a new one. A reputable Porsche repair shop can help assess the condition of your current bolt and provide you with options for replacement. If cost is a concern, you may want to consider exploring aftermarket parts or negotiating with the repair shop for a more affordable price. However, keep in mind that OEM parts may offer better quality and longevity.

part # 91dwwxx31 prices

• $10.88-$18.25

specifications maniheader:

• for models: 911, Boxster
• for years: 1997-2002
• brand: German
• type: Exhaust Manifold Bolt
• manufacturer part number: 91DWWXX31
• fits 1: 1997-2004 Porsche Boxster
• fits 2: 1999-2005 Porsche 911
• fit note: Exhaust Bolt Manifold To Catalyst
• manufacturer warranty: 12 Month Warranty
• attention: Please Read All Notes To Confirm Fitment
• cs-sku: 400

offer maniheader:

• quantity: 1
• sold: 0
• options: Ship-to-home
• availability: In Stock
• started: May 7, 2026

general maniheader:

• Car Truck Parts Accessories > Exhaust Emission Systems > Manifolds Headers
• condition: New

payments maniheader:

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

returns maniheader:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

seller maniheader:

• # reviews: 57817
• rating: 97.1%

shipping maniheader:

• service: Standard
• class: Standard
• type: Fixed
• cost: $0.00
• transit: 2-6 Days

German 91DWWXX31 Is Similar To:

• German 900-075-365-02 Porsche 2005-2008 Exhaust Bolt - Manifold To Main Catalyst 6 (39.8% similar) $14.95–$27.75. (July 6th, 2025)