Hello I did searched and im looking for the part number for the 1 step colder Iridium Spark plugs for a VIII and Cooper Ones too! thanks

also where can I get them cheap? online

NVM found them what are the Diff between this 2?

http://www.lancershop.com/customer/p...&cat=89&page=1

http://www.lancershop.com/customer/p...&cat=89&page=1

 

for copper go with either bpr8es or br8es. thats one step colder. the part numbers 3923 - Check ebay or extremepsi.com

 

what are the differences between those 2 and the ones on the link? Im looking for iridium..but I can get a set of cooper too

 

one has a protruding tip and one doesn't. order both and make sure you gap them within spec 0.22 or wherever your car is happy. Some cars like br8es, some like bpr8es.. so get both and see how it does.

 

Any other suggestions?!

 

stick with copper plugs. iridium doesnt work well with our cars because of the heat produced by the engine

 

Sir, go to your local parts store to buy them, unless they don't sell them where you live. I paid less than $2 for my bpr7es, and same $ for the step colder.

Stick with bpr not "br", I listened to the people on this fourm and tried them after a 1k mile my car starts miss firing, and I took out the plugs it starting fouling. br serier is too short!

stick with copper, copper has better conductivity than iridium; you can see it on periodic table.

 

i know that cooper conduct electricity better but ur cars come with iridium from factory so why u tell they dont work well..

I just want to know why lancershop calls them race plugs and the diff between both

 

iridium just last longer all high horsepower cars including the AMS drag car run copper plugs i know because i have a plug from the ams car lol bpr9es

 

So BPR or BP?

 

BPR first.. gap at .024-.026 and go from there. let us know how they do.

 

Evo 8:

Iridiums:

Stock heat range:
NGK iridium - BPR7EIX - $7.32/ea @ sparkplugs.com
Denso - IW22 - $11.99/ea @ sparkplugs.com

1/2 step colder:
NGK iridium - BR7EIX - $7.32/ea @ sparkplugs.com

1 step colder:
NGK iridium - BPR8EIX - $8.00/ea @ sparkplugs.com
Denso - IW24 - $11.99/ea @ sparkplugs.com

1 1/2 step colder:
NGK iridium - BR8EIX - $7.32/ea @ sparkplugs.com

Copper:
Gap @ .024-.026

Stock heat range:
NGK - BPR7ES - $2.24/ea @ sparkplugs.com
Denso - W22EPR-U - $2.24/ea @ sparkplugs.com
Autolite - 3924 - $1.90/ea @ Pep Boys or Kragen

1/2 step colder:
NGK - BR7ES - $2.24/ea @ sparkplugs.com
Denso - W22ESR-U - $2.24/ea @ sparkplugs.com

1 step colder:
NGK - BPR8ES - $2.24/ea @ sparkplugs.com
Denso - W24EPR-U - $2.24/ea @ sparkplugs.com

1 1/2 step colder:
NGK - BR8ES - $2.24/ea @ sparkplugs.com
Denso - W24ESR-U - $2.24/ea @ sparkplugs.com

Evo 9:

Iridiums:

Stock heat range:
NGK - ILFR7H - $11.71/ea @ sparkplugs.com
Denso - IKH22 - $11.95/ea @ sparkplugs.com
Autolite - XP5325 - $6.xx/ea @ Kragen

1 step colder:
NGK - R7437-8 - $41.52/ea @ sparkplugs.com
Denso - IKH24 - $11.95/ea @ sparkplugs.com


Evo 10:

Iridiums:

Stock heat range:

NGK - ILKR8E6 - OEM part #1822A021 - $13.23/ea @ mitsubishiparts.net

 

Great post!

 

Thanks for the info.

 

Definitely a helpful post!