Which spark plug do you guys recommend for my coupe?

 

From my experience and seeing many, many cars on the dyno this is the best plug:

Its one step colder than stock, if you want the stock heat range grab the LFR5

 

What he said^ Noticed a big difference when I changed my plugs and used those.

 

i have a used set. less than 10k miles

 

alright thanks i'm going to pick some tomorrow i really need to change my spark plugs out

 

Check for oil in the tubes when you do

 

^Yep. Especially cylinders 5 and 6
Also: https://g35driver.com/forums/engine-...ark-plugs.html

 

I went with the ngk iridium, bought today but my battery also died at the store had to buy a new battery. Changed out my spark plugs and I have oil in the tubes, how do I solve this issue now?

 

buy new valve covers. bye bye $$

 

^Not necessarily, somebody makes replacement seals. They're a vendor on here, I just can't remember who.

 

I believe you have to buy the whole valve cover from them and send in yours as a core... don't remember the cost but I'd rather just get new oem.. The newfangled replacements haven't been around that long who knows how long they're going to last?

 

^Not the one I remember.

 

How did you fix your "oil in #6"?

do you have upper and lower plemun installed?

 

Actually. The company is RD Factory Here on Driver. And they do sell the gaskets seperatly. They'll send you the diagram on where to drill out if you choose the route.