Thread: Best spark plugs for 2006 specv

Originally Posted by Nperez1986

For the NGK IX Iridium, what p/n? There are numerous on the Advance Auto website. Maybe some of them are colder than others, not sure. If not I was going with what shows up as "replacement" for this engine

If you are boosted, you want a step colder plugs, so LFR6AIX-11 is the part number you want.

Originally Posted by westner

Nissan recommends a colder plug in their shop manual for mostly highway driving and higher than normal revving. This may help reduce engine knock at these conditions (heat range 6 instead of the standard heat range 5).

I wonder if this applies to the VQ's? I think Imma swap the ol ladies plugs in the Altima to 6A as well.

*After a quick search, it appears the plugs are the same for both the QR25DE and the VQ35DE.

Originally Posted by MisterNuts

If you are boosted, you want a step colder plugs, so LFR6AIX-11 is the part number you want.

step colder only for boosted applications? or are they good for NA too. i drive probably 70% highway

Originally Posted by veeeeee

step colder only for boosted applications? or are they good for NA too. i drive probably 70% highway

Its been mentioned on page 1, if you're driving , high revving, and mostly highway, use a 1 step colder plugs.


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