Yes, I've had Whiteline front and rear bars on my '71 Ghia autoX car since June.

I couldn't be happier with the way the car stays flat and the way the blade adjusters let me dial in/out oversteer/understeer.

The competition bars I bought from Whiteline are...

Front (for ball joint)
BWF8XZ
22mm dia.

Rear
BWR1XZ (for IRS)
27mm dia.

I was introduced to them by Greg Ward who uses them on his Australian national hillclimb championship Beetle.

I can't say enough good things about these bars... excellent choice.

Jeff
'71 Ghia
Atlanta GA US