What's your opinion on side gapping spark plugs. I know you can get the same basic effect by buying more expensive plugs but do you think it's worth the effort? Are you aware of any testing that proves gains by side gapping?
Here's an article on it.
http://performanceunlimited.com/documents/plugsidegapping.html
Here's an article on it.
http://performanceunlimited.com/documents/plugsidegapping.html