Do I need to replace my stock Coil On Plugs at 100,000 Miles along with the Stock Spark Plugs? Do I need to change out anything else as well for a tune up? Should I go with OEM Replacement parts or has anyone had good luck with aftermarket parts and which aftermarket parts. I plan on going ahead a adding a Cold Air Intake too. I will be dyno tuning after the tune up so the parts gotta hold there own.

 

I would not change out the coils. Why change out a good part? As far as plugs go stay away from OEM and get the Champion 7989 one piece plug. @ 100k on stock plugs do your homework on removal and good luck. The stockers have been known to break.