For the original poster:

Here's something to think about. The fastest SRT-6 who posted times on DragTimes.com was using an LET 181mm pulley (Jeff Croy) and also using nitrous. But even without the nitrous, he still holds the fastest record.

Second: Harry using an Evotech pulley. I don't know what size that is, as the posted didn't specify.

Third: Cruizinquick with an ASP 178mm pulley.

Fourth: Rob@NeedsWings with an ASP 178mm pulley.

Fifth: DistantPulse with an ASP 178mm pulley.

Sixth: Brad with an ASP 178mm and Code3 68mm pulleys combined.

Seventh: Thumper with a Code3 pulley.

Eighth: Cross><fire with an ASP 178mm pulley.

Ninth: Mimi05SRT6 with a Code3 pulley.

Tenth: MrPhotoman with a Code3 pulley.

That means that half of the top ten fastest SRT-6s are using ASP 178mm pulleys. Four out of ten are using Code3 pulleys (one is using both). Notice that there have been no 185mm pulleys to break into that top ten list. To me that speaks volumes about which one to buy.