Go Premium! There are many ways:
Be infected and then subsequently spread the forum herpes while enjoying it.
or
Bite down hard and get ready for the dry run.
or
Spam what you're currently wearing in every active thread on the forum nonstop for weeks on end.
But I found the easiest method was simply to pay the membership and PM AK which decal design you want
Premium Membership is now active!
http://www.the370z.com/payments.php