Later R107 NGK Spark Plug Complete Installation Kit

Bosch is currently NLA. These solid copper NGKs are the best alternative, and come with the best tools and best procedures for 1976 to 1989 models with CIS (mechanical) fuel injection systems.

These will fit all 1976 to 1991 4.5, 3.8, 5.0 and 5.6-liter V8 engines with Bosch C.I.S fuel injection.  PLEASE NOTE: These spark plugs have an aluminum end cap that does screw off. You will receive the plugs with the end cap installed. Check your current spark plugs and spark plug wires before installing the new plugs. If your spark plug ends just show a tip with small threads, then you will need to take a pair of pliers and twist off the aluminum end caps before installing the new plugs in your V8 engine. These will really make the engine in your W116, W126 and R107 sing. 

Later R107 NGK Spark Plug Complete Installation Kit
$52.50
SKU:
GEG-L107PLUGKIT

Product Details

so you think platinum plugs are good for these engines.. :-)

Do not let anyone convince you to install some super platinum, iridium or kryptonite spark plug in your later model R107 SL V8. They are just not capable of handling the richer fuel mixtures associated with these older engines. After a time you will begin to experience rough running, hard starting and poor fuel economy. You need solid copper core plugs.
 

For ease and safety of removal and installation, we include in this kit a stiff flex head 10 inch long spark plug socket and a free length of braided fuel hose to make sure you do not cross thread the spark plug holes when you install these new plugs ( the video above will also show the use of the socket and the hose). We definitely recommend using a torque wrench when tightening spark plugs.( see below):

Here is a comparison between the Bosch and the NGK plug.

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