What is the consensus for the correct spark plug for a 2003 996? I check different vendors, all seem to have slightly different numbers for the bosch, which I believe to be the factory replacement.

I'm looking to order from local NAPA Canada, or from Rock Auto.....other vendors get nailed with high brokerage fees.

 

On my 04 I am using Denso 5304 Iridium TT plugs set at .031 gap. works great.

 

Start here

 

^^^^ Those are the ones I just installed in my 2003, along with Beru coils

https://www.rmeuropean.com/Products/...FG14-V916.aspx

 

Me too. I went to local Porsche dealer and picked up factory plugs. Don't want to mess with plugs and coils again anytime soon.

 

That is in stock a my local NAPA. Perfect and thanks.