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- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Mounting Kit for one Heat Exchanger
2 required per car
Restore the integrity of your Porsche Turbo exhaust system
with this OE Match Heat Exchanger Mounting Kit, designed specifically
for selected Porsche 911 Turbo models. Manufactured to original
equipment specifications, this complete fitting kit provides the essential
hardware required to securely mount the heat exchangers, ensuring correct
alignment, reliable sealing and long-term durability under the extreme operating
temperatures produced by the turbocharged flat-six engine.
Fits:
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
Kit included:
1x Large gasket for mounting heat exchanger to intermediate tube
3x Gasket for heat exchanger to cylinder head. 3 pcs. required for each heat exchanger
3x Bolt, M8x1.25x40mm
3x Nut M8x1.25, for mounting heat exchanger to cylinder head
3x Lock nut, M8x1.25
3x Nut, M8x1.25
Whether you're replacing worn heat exchangers, installing a new exhaust system or carrying out a full restoration, using new mounting hardware helps guarantee a secure installation while protecting valuable exhaust components from vibration and premature wear.
What Does the Heat Exchanger Mounting Kit Do?
The heat exchanger mounting kit secures the heat exchangers firmly to the engine and exhaust system while allowing for normal thermal expansion during operation.
Its primary functions include:
- Securing the heat exchangers to the engine.
- Maintaining correct exhaust system alignment.
- Supporting efficient cabin heating performance.
- Reducing vibration and unwanted movement.
- Helping maintain an effective exhaust gas seal.
- Preventing unnecessary stress on exhaust studs and flanges.
Correct mounting hardware is essential for the safe and reliable operation of both the exhaust and heating systems on the Porsche 911 Turbo.
Why Do Heat Exchanger Mounting Kits Fail?
Turbocharged engines generate significantly higher exhaust
temperatures than naturally aspirated models, placing additional stress on
mounting hardware. Common causes of failure include:
- Corrosion caused by moisture and road salt.
- Extreme heat cycles weakening fasteners.
- Seized or damaged nuts and bolts.
- Exhaust vibration causing fatigue over time.
- Damaged fixings during exhaust removal.
- Age-related deterioration after decades of service.
As the hardware deteriorates, heat exchangers can become loose, resulting in exhaust leaks, rattles, vibration and increased stress on surrounding exhaust components.
When Should the Heat Exchanger Mounting Kit Be Replaced?
The mounting kit should always be inspected whenever the
heat exchangers or exhaust system are removed. Replacement is recommended if
you notice:
- Rusted or seized fasteners.
- Broken or stretched hardware.
- Loose heat exchangers.
- Exhaust leaks around the mounting flanges.
- Excessive vibration or rattling.
- Damaged washers, locking plates or mounting hardware.
Many Porsche specialists recommend fitting a new mounting kit whenever replacing heat exchangers or carrying out major exhaust work to ensure reliable installation and avoid reusing weakened or corroded hardware.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91103KIT
The product you are viewing cross references to these numbers
- Porsche Boxster 986 2.5L 1997-99
The Mounting Kit for Catalytic Converter is an OE Match exhaust hardware kit designed as a direct-fit solution for supporting and securing the catalytic converter on the Porsche Boxster 986 2.5L. It includes all the essential clamps, connectors, gaskets, and fasteners needed to install or re-secure the catalytic converter/pipe assembly to the exhaust system.
Fits:
Porsche 986 Boxster 2.5L 10/1996>>
Kit included:
2x Pipe Connector, 45x49.5x75mm, stainless steel
2x Retaining plate, 5.0mm
2x Gasket
6x Bolt, M8x1.25x40mm
4x Lock nut, M8x1.25mm
6x Nut, M8x1.25
The kit is designed specifically for the Porsche Boxster 986 2.5L (1997–1999) exhaust layout and provides a complete set of hardware to replace worn, missing, or corroded mounting parts during exhaust work. Whether fitting a new catalytic converter or refreshing an existing exhaust installation, this kit ensures secure joints and proper alignment, helping prevent exhaust leaks and noise while maintaining correct exhaust flow.
This mounting kit supplies the hardware and seals needed to securely fasten the catalytic converter to the adjoining exhaust pipes. It ensures proper alignment, leak-free joints, and vibration-resistant connections, which are essential for efficient exhaust flow and emissions performance.
Function:
• Provides secure mounting for the catalytic converter and exhaust piping
• Includes connectors, plates, gaskets, nuts, bolts, and lock nuts
• Helps prevent exhaust leaks and reduces noise
• Supports proper alignment and vibration resistance
• design for direct, no-modification installation
The exhaust mounting hardware on older vehicles can suffer from corrosion, wear, or loosening due to repeated heat cycling and road conditions. Loose or deteriorated mounting parts can lead to exhaust leaks, noise, reduced performance, or even damage to catalytic converters and adjacent components. Replacing them with an OE Match mounting kit restores secure, leak-free connections and maintains the integrity of the catalytic converter and wider exhaust system.
When to replace:
• During catalytic converter or exhaust system replacement
• Hardware shows corrosion or stripped threads
• Noticeable exhaust leaks or rattles under acceleration
• After vibration or loosening of exhaust joints
• Routine service or restoration work
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 997 MKII Carrera C2 3.6L 2009-12
- Porsche 997 MKII Carrera C4 3.6L 2009-12
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche 997 MKII Carrera C4S 3.8L 2009-12
- Porsche 997 MKII GT3 / GT3 RS 2010-11
- Porsche 997 MKII Turbo 2010-13
- Porsche 997 MKII GT2 RS 2011-13
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- Porsche 991.1 R 4.0L (500 Bhp) 2016
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
- Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Speedster 4.0L (510Bhp) 2019
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Holy broken bolts Batman! Even the latest generation of DFI (9A1) heads on the water-cooled engines are reporting broken exhaust bolts. Tasks ranging from a simple exhaust system update through an engine removal, are consistently plagued by snapped, rusted, and broken exhaust manifold bolts. Rarely can an accurate removal of the broken bolt be performed with the engine in the car, and even after removal, the task is time consuming and if not done carefully can lead to a damaged head or faulty repair. STOMSKI RACING's answer to these problems is the SR069, a kit that easily, accurately, and flexibly allows you to drill out the broken bolts - with the engine still in the car- saving time and headaches. A CNC milled plate indexes precisely off the broken bolts and/or bolt holes. Using our uniquely designed Thumb Screws, the SR069 plate is locked in place (by threading a Thumb Screw over a broken bolt or by using a supplied bolt threaded through the SR069 Thumb Screw). With the included pilot drills and drill guides, the faulty bolt can be drilled out, producing a perfectly perpendicular and centered hole that if necessary can be chased with an included M8x1.25 tap.
Kit includes anodized aluminum fixture, drill bits, tap with extension, drill jigs/guides, Thumb Screws, and hardware in a sturdy storage case. Also includes our SR065D drill guide.
- Porsche Boxster 986 2.5L 1997-99
- Porsche Boxster 986 2.7L 1999-02
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster 986 2.7L 2003-04
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 996 GT3 MKI 1999-02
- Porsche 996 GT3 MKII 2003>>
- Porsche 996 GT3 RS 2003-04
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
With more and more broken exhaust bolts reported on the water-cooled engines, the headache of repairing a broken bolt is becoming epidemic. Tasks ranging from a simple exhaust system update through an engine removal, are consistently plagued by snapped, rusted, and broken exhaust manifold bolts. Rarely can an accurate removal of the broken bolt be performed with the engine in the car, and even after removal, the task is time consuming and if not done carefully can lead to a damaged head or faulty repair. STOMSKI RACING's answer to these problems is the SR067, a kit that easily, accurately, and flexibly allows you to drill out the broken bolts - with the engine still in the car- saving time and headaches. A CNC milled plate indexes precisely off the broken bolts and/or bolt holes. Using our uniquely designed Thumb Screws, the SR067 plate is locked in place (by threading a Thumb Screw over a broken bolt or by using a supplied bolt threaded through the SR067 Thumb Screw). With the included pilot drills and drill guides, the faulty bolt can be drilled out, producing a perfectly perpendicular and centered hole that if necessary can be chased with an included M8x1.25 tap.
Kit includes : anodized aluminum fixture, drill bits, tap with extension, drill jigs/guides, Thumb Screws, and hardware in a sturdy storage case.
Now also includes our SR065D drill guide.