The right heat-range spark plug matters on an air-cooled engine - the wrong plug causes fouling, pre-ignition, or poor cold starting. This is a genuine Bosch WR7DC, Porsche part number 999.170.156.90.

Fitment

• Confirmed: 1965-1989 Porsche 911, 1965-1969 Porsche 912, 1969-1976 Porsche 914, 1975-1989 Porsche 930
• Verify before ordering: confirm your model year and engine variant against your VIN/chassis number

Features

• Genuine Bosch WR7DC copper spark plug
• Correct heat range for air-cooled Porsche 911/912/914/930 engines
• Reliable cold starting and clean combustion
• Sold individually - verify total quantity needed for your engine

Specifications

• Brand: Bosch
• Bosch type: WR7DC
• Part Number: 999.170.156.90
• Material: copper core/nickel
• Country of Origin: Not verified for this listing - contact us to confirm

Frequently Asked Questions

• Will this fit my 1965-1989 Porsche 911? This part is confirmed for 1965-1989 Porsche 911, 1965-1969 Porsche 912, 1969-1976 Porsche 914, 1975-1989 Porsche 930. Cross-check your VIN/chassis to confirm your exact model and engine variant before ordering.
• Is this a genuine Bosch part? Yes - this is a genuine Bosch part, number 999.170.156.90, sold by Washburn's Metal.
• Are they sold individually? Yes. Plugs are sold one each, so order one per cylinder for your engine.
• What type of plug is the WR7DC? A Bosch copper-core, nickel spark plug in the heat range listed for air-cooled Porsche 911, 912, 914 and 930 engines.

⚠ WARNING: This product can expose you to chemicals including lead, known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.