HI , I am new to site and just bought a set of spark plugs(ngk BUR9EQP), I know they should have T and L for trailing and leading, but all 4 in the set has T on them.
Can I use them without any problems, did a search but couldn\'t find if its safe to use them I only know that idle would be rough during engine warm up , any other effects? :)
you can use them in both the leading and trailing no probs
They are fine. I m using them too-all around. They work fine for me.
Syed
Same here :)
Thank you all =))