911RufRT

I'm about to change my plugs/coils and I have used Bosch FR6 LDC's #7410 for the past 6 years with no problems. When I made my recent parts order I made a mistake and I got Bosch FGR7DDP's #4303 instead. Has anyone used these or are they correct for a 996T?

Thanks in advance!

raineycd

I would probably stick with the FR6 with the amount of time it takes to get to the plugs - you don't want to have to do it again if they do not work...

911RufRT

Do these platinum plugs work okay in our 996T engine's. I'm pretty sure I have seen 997T's using Bosch Platinums in some shops I visited. Ruf Germany actually recommended using NGK's or factory Beru's?

raineycd

They may or may not work depending on plug temp and gap. I would check with your tuner or mechanic to be sure. I have put in a set of plugs that were not compatible out of the box and had misfire issues and had to change plugs....

911RufRT

Thanks for the info! The ones that didn't work for you, were they platinums?

raineycd

They were iridium, but that was not the problem. The metal is not the issue, the gap and temp are the issues. I am running platinum right now, but they may not work for you since I have a lot of mods:

6 - Denso Double platinum
Stock Number: 3245
Part Number: PK20PR-P8

911RufRT

Do you remember what gap size you used for that plug?

raineycd

They came gapped for my needs out of the box.

911RufRT

Sounds good. Thanks again!

raineycd

No problem! Good luck! Are you installing them yourself?

911RufRT

Unfortunately yes, but its not as bad as I thought. Just a time consuming job and I would hate to install the wrong plugs after all that work. My dealer wanted $1900 for the job with new original coils but I bought the Beru's from AutohauzAZ for $238 shipped.

raineycd

Yeah it is not a bad job, but is a bit time consuming. First time is the hardest learning all the locations of bolts, etc.

No SubstiTTute

My dealer also quoted me $1900 for coils and plugs. A friend and I changed them out a few months back for the cost of the coils and the Bosch FR6 LDC's. The various DIY articles on the this site and others were invaluable. The car runs great now. With the old parts the engine had a slight off idle hesitation when it was cold.