I got the one step colder NGK's as well. The autolites will work just fine from what I hear. How much boost are you planning on running? Unless you get all of the supporting mods and go at leat 18 PSI, I wouldn't bother.
I'm not going to race my car. Just have a fun play toy. Where I live, it is HOT and HUMID!!!! My car is going to have a tune this weekend, which means I need new spark plugs ASAP!!!!
No one has either brand available. Advanced Auto Parts can order either brand. O’Rileys can order the NGK. That is by calling the local shops down here.
Since I got the NGK LTR7IX-11 plugs, my car now has a problem. The check engine light is on. Also, it feels like my car back fires on occasion. Anyone know what the issue could be? (uhm)