· Premium Member
1993 RMW, 1996 RMW, 1992 OCC
Guaranteed there's a noticeable difference going from 28mm to 30mm. I found the 30mm Impala SS bar to be a much better match to my 21mm rear panther bar than the stock wagon 28mm was. I found the 32mm 2nd gen Trans Am bar (which also has slightly shorter arms) to be too stiff. These were all hollow bars. 2mm of diameter makes a ton of difference.I don't know that. I suspect one would be hard pressed to tell the difference.
Bolt up a Hotchkis bar if you want a noticable difference.