Ok...looking on JDMHondaparts website, I see that the model number on the spoon plugs is IK24 and I know that Denso makes Spoon's plugs (correct)...so, I see on Denso's website that they recommend the IK20 plugs for our R's...anyways, what's the difference, heat range? How would running the 24's opposed to the 20's affect my car's performance (car's stock)? Thanks

 

I think if your car is stock, stick with stock plug.