I got a MyCal from LMS and I'm planning on loading a stage 4+ on my 2010 SHO. I know I should replace the spark plugs with 1 stage colder plugs and gap them to .0300 My question is does anyone know the stock heat range and gap? According to Ford's site I have motorcraft SP512, but they show SP528 for the 2011. I'm confused because I got a set of NGK LTR7IX-11 that I thought were 1 stage colder, heat range 7. But the 2013 SHO's have the SP534, which was stated on this forum that they are the same as NGK LTR6CI-8 which are heat range 6. I just want to make sure I am selecting the right plugs. Thanks.
Brad
2010 SHO with PP
Sent from my iPhone
Brad
2010 SHO with PP
Sent from my iPhone