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Porsche > Boxster 986/987/981 (1997-2016) > Engine Rebuild Parts > Engine Mounts >

Engine motor mounts solid aluminum SET OF 2. Porsche 911 1965-89  ❭  M02

Engine motor mounts solid aluminum SET OF 2. Porsche 911 1965-89 - 91137504306, 91137504300, 91137504307 - M02
2
Check vehicle fitment
M02
Product Information
Product Information
Rennline Solid Motor / Engine Mounts Pair. ALUMINIUM.
SET OF 2.

rennline

Fits:
Porsche 911 1965-69 Engine Mount
Porsche 911 1970-86 Engine & 915 Gearbox Mount
Porsche 911 1986-89 Engine Mount
Porsche 930 1975-77 Engine Mount
Porsche 930 1978-89 Engine Mount
(not CS, not Cabrio)

Solid engine and transmission mounts are a smart upgrade to any track or aggressive street car, and were installed on Porsche factory race cars. Stock mounts are made of compliant rubber, and contribute to imprecise shifting and inferior throttle response. Solid mounts create slightly more interior vibration than rubber mounts, but securely connect the engine and transmission assembly to the car's unibody, creating a crisper throttle response and shifter feel. Rennline's solid mounts are CNC machined from 6061 aluminum for strength and light weight, and come with new Grade 8 mounting hardware.

Rennline mounts install easily in both the transmission and engine mount locations for all 1971-89 911's, and in the engine mount locations only for pre-1971 911's. Motorsport Product.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

M02
91137504306
91137504300
91137504307

The product you are viewing cross references to these numbers
Related products
Engine mount. Porsche 986 Boxster 1997-04 / 987 Boxster 2005 > / 987C Cayman 2006 > - 98737502304, 98737502305, 98637502307, 9863750230
4
Engine mount. Porsche 986 Boxster 1997-04 / 987 Boxster 2005 > / 987C Cayman 2006 >
Best Price
98737502305/1
Product Information
Product Information
Engine mount Part number 987.375.023.05 (often written 98737502305) is the centre engine mount / mount insulator used on mid-engine Porsche Boxster/Cayman models, commonly fitted to late 986 and 987 Boxster / early 987 Cayman applications. The item is offered both as the complete mount and bracket assembly and as a replacement bushing/insulator that must be pressed into the aluminium bracket.

Position: center engine mount (the central mount that locates the engine fore/aft and resists torque). 

oematch

Fits:
  • 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 Cayman 2.7L 987C 2006-08
  • Porsche Cayman S 3.4L 987C 2005-08  


Replace the part when it has lost its ability to control engine movement and damp vibration. Typical triggers to replace the centre mount include: 

  • Hard clunk or bang on acceleration, deceleration or gear changes (engine shifting against chassis).
  • Excessive vibration into the cabin, especially at idle or specific RPM bands.
  • Visible damage — torn, separated rubber, oil-soaked or collapsed mount/bushing, or corrosion of mating faces. 


Common issues & failure causes

  • Rubber deterioration: age, heat cycling and mechanical fatigue cause the rubber to harden, crack or de-bond from the metal, reducing isolation and allowing increased engine movement.
  • Fluid contamination: oil or coolant leaks accelerate rubber breakdown (softening or swelling), commonly seen on older engines where leaks occur.
  • Mechanical shock / abuse: repeated hard launches, aggressive shifting or collisions can cause sudden mount failure or promote early fatigue.
  • Bracket wear / corrosion: the bushing may be fine, but the aluminium bracket can crack, corrode, or the bushing may need pressing into a worn bracket — which is why some techs prefer replacing the full assembly. 


This product supersedes Porsche's old part numbers:
- 98737502304

Click 'Zoom in' for large parts diagram.
Diagram Ref No 2.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

98737502305
98737502304
98737502305
98637502307
9863750230

The product you are viewing cross references to these numbers
Engine Mount Stop. Porsche 987 Boxster / 987 Cayman - 9A137525701, 98737525503, 98737525505
4
Engine Mount Stop. Porsche 987 Boxster / 987 Cayman
Special Order item
9A137525701
Product Information
Product Information
Engine Mount Stop.
porsche

Fits:
Porsche 987 Boxster / S 2005-08
Porsche 987 Boxster / S 2009-12
Porsche 987C Cayman / S 2005-08
Porsche 987C Cayman / S 2009-12

This product supersedes Porsche's old part numbers:
- 98737525503
- 98737525505

Price is for each.

Click 'Zoom in' for large parts diagram.
Diagram Ref No 3

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A137525701
9A137525701
98737525503
98737525505

The product you are viewing cross references to these numbers
Engine Suspension Bracket. Porsche 987 MKII Boxster / 987 Cayman MKII - 9A137502322
4
Engine Suspension Bracket. Porsche 987 MKII Boxster / 987 Cayman MKII
Special Order item
9A137502322
Product Information
Product Information
Engine Suspension Bracket.

 
Fits:
Porsche 987 Boxster / S 2009-12
Porsche 987C Cayman / S 2009-12

Diagram ref no 2



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A137502322
9A137502322

The product you are viewing cross references to these numbers