Thank You.
I have BUR6EFSZ NGK spark plug installed on my V8 and I don’t have any problem with them, but I find on www.ngk.com that for Audi V8 3.6l PT engine are recommended TR5 or ITR5F-13 NGK spark plugs, and I become confused…
And BUR6EFSZ are for A8 3.7l AEW and V8 (4.2l ABH) also S8 4.2l ACH and A8 4.2l ABZ…?!?