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Product details
The PMO PM-O503-0 is a left and right pair of steel heater block-off plates that closes the gap between the fan ring and the engine block on most air-cooled Porsche flat-six engines once the heater has been eliminated. The set combines PMO's PM-O502-0 left plate and PM-O501-0 right plate with OE-style mounting hardware. PMO says closing that gap helps cooling while tidying up the engine compartment.
Both plates are steel, covered in a durable finish, and each is shaped for its own side of the engine. PMO also sells them individually under the two plate numbers above, which is the simpler order when only one side is missing or bent. They are part of a heater delete, so fit them with the heater system already removed from the engine.
Technical Details
- Manufacturer: PMO
- Manufacturer part number: PM-O503-0
- Contents: PM-O502-0 left plate, PM-O501-0 right plate, and OE-style hardware
- Material: steel
- Finish: durable protective coating
- Sold as: left and right set
Fitment & Compatibility
PMO rates this set for most air-cooled flat-six engines and lists it among its suggested parts for the 911 and the 914-6. PMO's wording is most engines, so compare the plates against your fan housing and case before final assembly.
Common Questions
Is this sold as a pair?
Yes. PM-O503-0 contains both the left plate (PM-O502-0) and the right plate (PM-O501-0), with OE-style mounting hardware.
Will these work on a 914-6 engine?
PMO lists the set as a suggested part for the 914-6 as well as the 911, and rates it for most air-cooled flat-six engines.
Can I keep my cabin heat with these installed?
No. PMO makes them for engines where the heater has been eliminated, to close the gap the heater leaves behind.
PMB Performance has 20+ years with air-cooled 911 engines and can help you plan a heater delete.
