Spark plug help

[Fugglequest]

So I bought 4 of these 2 years ago for the engine but only just finally got it in the car, was hoping some one could jog my mind if they know these are leading or trailing , and if any knows what the NGK code is for the one it's not. Cheers

 

[Myocardial Infarction]

Really depends on the engine and heat range you want produced.

Factory recommendation for the FD3s was 2 x BUR7EQP (7’s) for Leading plugs and 2 x BUR9EQP (9’s) for the trailing plugs, but some run 9's all round.

 

[Fugglequest]

Really depends on the engine and heat range you want produced.

Factory recommendation for the FD3s was 2 x BUR7EQP (7’s) for Leading plugs and 2 x BUR9EQP (9’s) for the trailing plugs, but some run 9's all round.

completely stock build so guessing best going with factory recommendation .

 

[initialDean]

Ain’t they the same in either? I use all the same.

 

[jdmr_neil]

Id just put the 9s in Leading and trailing save getting mixed up in the future