Genuine 99908405202 Exhaust Nut

Name: Genuine 99908405202 Exhaust Nut
Brand: Genuine
SKU: DFPH-99908405202
Price: 20.69 USD
Availability: InStock

66 vehicles fit this part

Select your vehicle to confirm fitment

Verify this part fits before purchasing — free returns if it doesn't

$20.69Free Shipping

Free ShippingNo Cost to Continental U.S.

Free Returns*Wrong fit? No cost

60-Day ReturnsMoney back guarantee

*Free return shipping only qualifies if our fitment verification tool is used.

In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.

OE Direct Replacement — Bolt-on fit, no modifications needed

Fitment: Porsche, 911, Boxster, and Cayman

Easy Returns — Return within 60 days for a full refund

Fast Shipping — Most orders ship same business day before 1pm CST

Not what you need? See all Exhaust Nut options

Porsche Exhaust Nut for Manifold and Catalyst Connections

This Genuine exhaust nut, part number 99908405202, is used on select Porsche exhaust flange connections where secure fastening is critical. It is a direct-fit hardware component for Porsche 911, Boxster, and Cayman applications with manifold-to-catalyst or turbo-related exhaust joints.

Key Features

Genuine OEM exhaust hardware
Part number 99908405202
Used at manifold-to-catalyst and turbo exhaust connections
Compatible with select Porsche 911, Boxster, and Cayman models
Supports proper clamping at exhaust flange joints

Detailed Description

Genuine 99908405202 is an exhaust nut specified for Porsche exhaust hardware applications. It is used on 1999-2008 Porsche 911 models at the manifold to catalyst connection, 1997-2008 Porsche Boxster models at the manifold to catalyst connection, and 2006-2008 Porsche Cayman models at the manifold to catalyst connection. It also applies to 2001-2005 Porsche 911 turbo exhaust connections, including turbo to catalyst-muffler locations. For buyers searching for a Porsche 911 exhaust nut, Boxster exhaust hardware, or Cayman manifold-to-catalyst fastener, this OE part number 99908405202 matches the listed applications.

Common Uses

Replacing a damaged or seized exhaust flange nut
Restoring secure fastening at manifold-to-catalyst joints
Addressing exhaust leaks at turbo-related connections
Repairing worn Porsche exhaust hardware during service work

Installation Notes and Tips

Verify the exact exhaust joint location before installation, since this part is listed for manifold-to-catalyst and turbo-related positions only. Inspect the mating studs, flanges, and surrounding hardware for wear or corrosion before assembly. This part cross-references Porsche OE number 99908405202 for the same application.

Quality Assurance

Genuine OEM hardware is supplied to match the listed Porsche applications and factory-style fitment requirements.

This part fits 66 vehicles. Search below:

Year	Make	Model	Submodel	Position	Notes
2008	Porsche	911	Targa 4	N/A	Manifold to Catalyst
2008	Porsche	911	Targa 4S	N/A	Manifold to Catalyst
2008	Porsche	911	Carrera	N/A	Manifold to Catalyst
2008	Porsche	911	Carrera 4	N/A	Manifold to Catalyst
2008	Porsche	911	Carrera 4S	N/A	Manifold to Catalyst
2008	Porsche	911	Carrera S	N/A	Manifold to Catalyst
2008	Porsche	Boxster		N/A	Manifold to Catalyst
2008	Porsche	Cayman		N/A	Manifold to Catalyst
2007	Porsche	911	Targa 4	N/A	Manifold to Catalyst
2007	Porsche	911	Targa 4S	N/A	Manifold to Catalyst
2007	Porsche	911	Carrera	N/A	Manifold to Catalyst
2007	Porsche	911	Carrera 4	N/A	Manifold to Catalyst
2007	Porsche	911	Carrera 4S	N/A	Manifold to Catalyst
2007	Porsche	911	Carrera S	N/A	Manifold to Catalyst
2007	Porsche	Boxster		N/A	Manifold to Catalyst
2007	Porsche	Cayman		N/A	Manifold to Catalyst
2006	Porsche	911		N/A	Manifold to Catalyst
2006	Porsche	Boxster		N/A	Manifold to Catalyst
2006	Porsche	Cayman		N/A	Manifold to Catalyst
2005	Porsche	911	GT3	N/A	Manifold to Catalyst
2005	Porsche	911	Carrera	N/A	Manifold to Catalyst
2005	Porsche	911	Carrera 4S	N/A	Manifold to Catalyst
2005	Porsche	911	Turbo	N/A	Manifold to Turbo
2005	Porsche	911	Turbo	N/A	Turbo; Turbo to Catalyst-Muffler
2005	Porsche	911	Carrera S	N/A	Manifold to Catalyst
2005	Porsche	911	GT2	N/A	Manifold to Turbo
2005	Porsche	911	GT2	N/A	Turbo to Catalyst-Muffler
2005	Porsche	911	Turbo S	N/A	Manifold to Turbo
2005	Porsche	911	Turbo S	N/A	Turbo to Catalyst-Muffler
2005	Porsche	Boxster		N/A	Manifold to Catalyst
2004	Porsche	911	GT3	N/A	Manifold to Catalyst
2004	Porsche	911	Carrera	N/A	Manifold to Catalyst
2004	Porsche	911	Carrera 4	N/A	Manifold to Catalyst
2004	Porsche	911	Carrera 4S	N/A	Manifold to Catalyst
2004	Porsche	911	Turbo	N/A	Manifold to Turbo
2004	Porsche	911	Turbo	N/A	Turbo; Turbo to Catalyst-Muffler
2004	Porsche	911	GT2	N/A	Manifold to Turbo
2004	Porsche	911	GT2	N/A	Turbo to Catalyst-Muffler
2004	Porsche	Boxster		N/A	Manifold to Catalyst
2003	Porsche	911	Carrera	N/A	Manifold to Catalyst
2003	Porsche	911	Carrera 4	N/A	Manifold to Catalyst
2003	Porsche	911	Carrera 4S	N/A	Manifold to Catalyst
2003	Porsche	911	Turbo	N/A	Manifold to Turbo
2003	Porsche	911	Turbo	N/A	Turbo; Turbo to Catalyst-Muffler
2003	Porsche	911	GT2	N/A	Manifold to Turbo
2003	Porsche	911	GT2	N/A	Turbo to Catalyst-Muffler
2003	Porsche	Boxster		N/A	Manifold to Catalyst
2002	Porsche	911	Carrera	N/A	Manifold to Catalyst
2002	Porsche	911	Carrera 4	N/A	Manifold to Catalyst
2002	Porsche	911	Carrera 4S	N/A	Manifold to Catalyst
2002	Porsche	911	Turbo	N/A	Manifold to Turbo
2002	Porsche	911	Turbo	N/A	Turbo; Turbo to Catalyst-Muffler
2002	Porsche	911	GT2	N/A	Manifold to Turbo
2002	Porsche	911	GT2	N/A	Turbo to Catalyst-Muffler
2002	Porsche	Boxster		N/A	Manifold to Catalyst
2001	Porsche	911	Carrera	N/A	Manifold to Catalyst
2001	Porsche	911	Carrera 4	N/A	Manifold to Catalyst
2001	Porsche	911	Turbo	N/A	Manifold to Turbo
2001	Porsche	911	Turbo	N/A	Turbo; Turbo to Catalyst-Muffler
2001	Porsche	Boxster		N/A	Manifold to Catalyst
2000	Porsche	911		N/A	Manifold to Catalyst
2000	Porsche	Boxster		N/A	Manifold to Catalyst
1999	Porsche	911		N/A	Manifold to Catalyst
1999	Porsche	Boxster		N/A	Manifold to Catalyst
1998	Porsche	Boxster		N/A	Manifold to Catalyst
1997	Porsche	Boxster		N/A	Manifold to Catalyst

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.