We stock parts for the Alfa Romeo 1300, 1600, 1750/1800 and 2000 Giulia Series.
We sell the NGK B7ES spark plugs.
The Golden Lodge 2HL is a great spark plug. However, over the years many alfisti have been using the NGK sparks. Be careful so you get the correct plug for your 105 engine. A lot of alfisti use B7ES and not the BP7ES. Please click to enlarge the chart with the NGK information.
The "P" indicates that the electrode is a bit further down on the spark plug. The NGK refer to this as "projected insulator". To avoid the electrode to and the spark to become too close to the piston, do not use the P plug.
Instead, use the B7ES where the electrode is not projected. The B7ES plugs have the correct temperature and the electrode is not causing picking or maybe causing other ignition problems.
The first letter "B" means the threading. In Europe "B" means 14mm thread (M14 x 1.25).
The letter "E" means the length of the threading, in this case 19 mm. The shorter threading has "H" as an indicator, = 12.7 mm.
The "7" tells us about the temperature of the spark plug.
"P" means "projected insulator".
The "S" is just for information about the material in the plug. NGK has this S to tell that there is a copper in the core of the plug.