Spezial developed spark plug made by Isolator (original Spare part). Fit to the 4-cylinder 4-stroke engine with 1100 ccm or 1300 ccm cylinder capacity of the Trabant 1,1 and Wartburg 1,3 and Barkas B1000-1.
- tap: D=14mm, lenght: 15mm
- spanner gap: 21
- four pieces will be needed
