[Rmtt]

Just a quick question. Any header upgrade I've ever done always (especially on LS Engines) always involved running a slightly colder spark plug. It just made tuning so much more stable.

For those of you who went to catless longtubes like AA which I have, did you guys do this or just stick to the stock OEM recommended plug?

I will still have my secondaries although I'm still debating my set up from there back.

Thanks!