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- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Exhaust Clamp for Cross Over Pipe Clamp Half
Sold each - 2 required per car
Maintain a secure and leak-free exhaust system with Exhaust
Clamp, designed for use on the cross over pipe of Porsche 911
models produced between 1975 and 1989. Manufactured from mild steel, this clamp
need two matching half sections that bolt together around the exhaust
pipe connection, providing the clamping force required to secure and seal the
joint.
Fits:
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Diagram ref no 11
The cross over pipe forms an important part of the air-cooled Porsche exhaust system, helping direct exhaust gases between engine banks and associated exhaust components. The clamp plays a critical role in maintaining correct pipe alignment while preventing movement, vibration and exhaust leaks.
Over time, original exhaust clamps can become corroded, weakened or damaged due to repeated heat cycles, moisture exposure and road contamination. Replacing worn clamps helps ensure reliable exhaust system operation and supports long-term durability.
What Does an Exhaust Clamp Do?
An exhaust clamp secures adjoining exhaust components together while helping maintain a tight and stable connection.
A properly functioning exhaust clamp helps:
- Secure exhaust pipe joints
- Maintain correct pipe alignment
- Reduce exhaust movement and vibration
- Help prevent exhaust gas leaks
- Support gasket sealing performance
- Improve exhaust system reliability
- Protect connected exhaust components
Without sufficient clamping force, exhaust joints can loosen and allow gases to escape.
Symptoms of Wear or Failure
Exhaust clamps operate in one of the harshest environments on the vehicle and are constantly exposed to heat, corrosion and vibration.
Common signs that replacement may be required include:
- Visible rust or corrosion
- Cracked or weakened clamp sections
- Loose exhaust joints
- Exhaust blowing noises
- Rattling from the exhaust system
- Exhaust leaks around pipe connections
- Soot deposits around clamp areas
- Distorted or damaged clamp halves
- Difficulty maintaining correct torque
A failing clamp can allow excessive movement within the exhaust system, leading to leaks and additional component wear.
Why Replacement Matters
Replacing a worn exhaust clamp helps maintain exhaust system integrity and prevents unnecessary stress on surrounding components.
Benefits include:
- Restores secure pipe connections
- Reduces exhaust leaks
- Improves exhaust system stability
- Minimises vibration and rattles
- Helps maintain proper exhaust flow
- Protects connected pipes and silencers
- Supports reliable long-term performance
- Improves repair and restoration quality
For classic air-cooled Porsche 911 models, replacing ageing exhaust hardware is an important part of maintaining both performance and reliability.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91111118700
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
Fits:
Porsche 964 (911) C2 1989-93
Porsche 964 (911) C4 1989-93
Porsche 964 (911) RS 3.6L 1991-93
Porsche 964 (911) RS 3.8L 1991-93
Ninemeister Converter Repair Flange
Over time, age, heat cycles, and corrosion take their toll on Porsche exhaust systems. A common weak point is the catalytic converter flange, which can corrode and eventually disintegrate. When this happens, it compromises the seal in your exhaust system, leading to exhaust leaks, loss of performance, and increased noise.
The Ninemeister repair flange is a high-quality replacement solution designed specifically to restore your Porsche’s exhaust integrity.
Key Features
- Direct
Repair Solution – allows you to remove the corroded flange and re-weld
this precision-machined replacement in place.
- Durable
Construction – built to withstand the extreme heat and corrosive
conditions of Porsche exhaust systems.
- Restores
Exhaust Sealing – eliminates leaks, restores back pressure, and
ensures smooth engine performance.
- Cost-Effective
Repair – no need to replace the entire catalytic converter when only
the flange is damaged.
- Tailored Fitment – engineered to match Porsche specifications for proper alignment and fit.
Why Replace a Corroded Converter Flange?
- Eliminate
Exhaust Leaks – prevent harmful gases from escaping and affecting
cabin safety.
- Restore
Performance – exhaust leaks reduce back pressure, causing poor
throttle response and reduced efficiency.
- Prevent
Further Damage – corrosion at the flange can spread, leading to costly
catalytic converter or exhaust system replacements.
- Long-Term Reliability – a fresh flange ensures your exhaust remains structurally sound for years to come.
The Ninemeister catalytic converter repair flange provides a reliable, cost-effective fix for corroded catalytic converter
flanges, helping you keep your Porsche exhaust system safe, efficient, and true
to factory performance.
Section of diagram ref no 1
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9M96411104205
The product you are viewing cross references to these numbers