http://go.mrgasket.com/pdf/sparkplugs.pdf I ordered a set for my brothers car. Will see how they help clear. These are new. They helped me on my old Iron heads and hedman headers.
not to highjack the thread.......:evilsmile But I am changing plugs in PINKY going with the AR3924. *Its painful when you purchase plugs and oil from Sumitt and your bill is over $100
I use the shortys on my sons Chebby. Did anyone else notice that ACCEL mis-spelled the word header on that advertisement? Unless they actually changed the spelling of header to ehader and nobody told us.
actually those have been around for awhile... champion make shorty too... but they still are too close for ROUSH 200 and worst if you have the wrong headers!
Yes, you are right that shorty plugs have been around. I use them in my roush 200 and it made all the difference. This new shorty plug is the 5/8 hex extended reach plug that was not available before for aluminim heads BTW accel= champion