Can anyone list the the spark plug part numbers and the heat range why would you go with a hotter or colder plug and the gap numbers thanks.

 

Pay a visit to sparkplugs.com and read up. They have everything you want there. Go 1 step colder for every hundred hp you increase by.

 

I like item no: 3994 from sparkplugs.
NGK BP8ES. no resistor so may interfere w/stereo, etc. I have no stereo -RS.

 

For an Evo 8 BR7ES/BR8ES are the proper plugs. Some use BPR7ES/BPR8ES.

IW22/IW24 are the iridiums you'd want. For mild mods 7 or IW22 heat range. A bit wilder and you'd want a 8 or IW24 heat range. .026 is a safe gap to start with.

If you plan to get tuned, ask the tuner what he recommends.

 

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Stock setups go with bpr6es, 7's and 8's from there, stock gap should be fine.

You really shouldn't need anything colder for quite a while.

 

Just stick with stock-- stock part number and heat range. Stock plugs are in cars with 500whp+.

 

what is stock gap?

 

Agreed x2

 

Stock, they come pre gapped.

 

Agreed as well.
X3

 

On E85 on both sotck turb oand BBK full I had to Denso IKH22 (1 step colder) because I kept breaking up under high boost/high rpm. Before i go black the ignition system is getting upgraded.

 

You should be using ngk's!