Trick flow heads ID

Anyone know how to ID a set of Trick Flow heads? One is marked with G02431-3 and the other has G02439-3. They don't appear to be the twisted version.
Thanks,
Steve

Give em a call,

Trick Flow Specialties
1248 Southeast Avenue
Tallmadge, OH 44278
Sales & Tech: (330) 630-1555
Fax: (330) 630-5565

Thanks!

Steve