To find out, we consulted leading spark plug manufacturersincluding Bosch, Champion ... The porcelain end of todays standard plugs is longer than that of equivalent plugs from the classic ...

Bosch's reputation as a manufacturer of quality spark plugs — a business the company has been in since 1902 — is evident in its Amazon ratings. Its Double Platinum plugs maintain a 4.5-star ...

In 1960, Bosch recognised the value that platinum added to automotive spark plugs, providing improved corrosion and erosion resistance and a longer performance life than found with the standard ...