NGK # 6509 Iridium Spark Plug LTR6IX-11 - 6 PCSNEW

These spark plugs installed without issues on my 5th gen Camaro. They fit perfectly and they function without issue. I haven't put many miles on them, but they keep my engine idling a lot better than the replaced spark plugs. I can't comment on performance just yet, but I expect that they will meet the performance of the original spark plugs.

Shipping and price was perfect for the situation

Perfect the 1st time. This was for my 2009 Suzuki Grand Vitara 3.2 V6.

Routine maintenance on my wife's car. Engine was running a little rough and her gas mileage was off. It had been 100,000 miles since it was done last. Changed the plugs and everything was cured. Plugs worked great!

Right for for my 2014 mustang 3.7l. My car runs much smoother and has a better idle now. I even saw an increase on MPG

I guess I was expecting more power or something, however, it works just as the original Acdelco. If that's what you were looking for, than you're good.

These plugs were exact fitment with gap accuracy on the money! My vehicle takes off now. The engine runs much smoother than it was running! I believe I'm now getting the accurate gas mileage now... No Misfires at all. I hand wrench them all the way in, the grooves were exact! I didn't even have to torque wrench them. But I made sure they were at the accurate torque. I recommend these plugs besides the OEM plugs.

Can always count on ngk