I just finished changing out all my spark plugs on my Boxster. I used the Bosch FR7LDC,OEM just as recommended. Here is what I noticed along the way to changing the plugs;
1.Taking your car to the dealership is a waste,this is soo easy,just be patient
2.My three of my old plugs(Bosch FR7LDC) had gold ends(opposite side of the electrode),three had silver,does this matter? All the of the new ones had silver ends.
3. After installation I fired her up and it seemed to idle a little smoother and started up a tad bit quicker.
Ha,I just saved $12 in parts and $120 in labor from the stealership.
Now all that is left for my 60k maintainence is the fuel filter change.
With the money I saved I think I might get an alignment.