well they are gold and have like a protecting clover shape bottom. i had mine put in for 100 bux at M.A.D enhansments. they made to last to 100 000kms. just need to clean them now and again. i get abt 480-500kms out of a full tank.

well my friend at MAD put the iridiums and the atomic to the test and to see how they both spark.
iridiums : fast and sharp little sparks sound like "tik tik tik tik"
atomic: bits slower then the iridiums but more power and loud i'm guessing would be more effective sounds like back fire from car. "pow pow pow"

thats abt all i know.