Difference of spark plugs for 08 CTT

[ferri]

Hi,
I ordered spark plugs for doing the maintenance for my 08 CTT. Now I'm not sure anymore because of the PDF-catalogue which I have.
There are two different spark plugs in the Porsche catalogue :

- 999 170 229 90 : Spark plug 14F-5MPUR03 (remark -08) with a gap of 0.8mm

and
- 999 170 228 90 : Spark plug FR6 NPP (remark 09-) with a gap of 0.7mm

Which one do I need? They are both for the engine M48.51, I think I have to get the FR6 NPP

ECS and Suncoast recommend the 999 170 228 90, but what's the difference?

Thank you in advance for the replies


greetz

Edited March 17, 2018 by ferri

[Loren]

In the current Porsche Parts list, only 999 170 228 90 is shown. So that would be the one to use.

[ferri]

Thank you

I saw that the plugs with the gap of 0.8 where replaced with the plugs and gap of 0.7

because of a new knowledge, but I was not sure and I didn't want to hurt the engine.

 

Does someone know anything further for this replacement of spark plugs in the Porsche-cat?

Of course it's not helpful but it is interesting for me...

 

Edited March 17, 2018 by ferri