take out your airbox, or in your case intake and look on the side of the engine. there are 2 coil packs, take them out and take the plugs out and replace them. Good luck with the drivers side.

 

I had always believed you were supposed to go one step colder for around ever 100hp over stock.... is this not true? Good luck with the drivers side i could never see them bastards.

 

I just did mine with my install, they are a PITA like everything else in the car.

Locate you valve covers in your engine, the top cover on the sides of the engine. Running thru the middle of the 2 cams you will see 2 black boxes, these are your coil pack, there is a 12mm bolt holding these in place. Take them out, thenm use a screw driver to pop them out. Get a spark plug socket and go at it. You can use a short extension for your rachet wrench and take them out.

The passenger side has more room to work on than the drivers side. I actually had to push the engine to the passenger side to move it a little to be able to take the coil packs of the drivers side. Not too difficult but you do have to take a few things appart to get to them.

I went with NGK one step colder and got them from Racing zone in Orlando for $19 with tax for the set, so they were like 3.50 each or something like that.

 

I will have to check when I get home, because I cannot remember right now, but I think it was the same as stock but instead of a 6 they had a 7 in there.

 

Yes it is, the car dynoed at 272whp on CFT's Mustang dyno this saturday, I guess around 300whp on a dynojet. I was running still the factory plugs, when I took them out, I pretty much didn't have anything left, 62000+ miles