Yes thats their heavy duty 20mm option for the GTA, the have an 18mm one as well.
The extra 2mm makes it 52% stiffer!
From memory the effective stiffness is proportional to the diameter to the power of 4!!
A handy effective stiffness chart is on page 4 of the Whiteline catalog.
Cheers,
TB
Originally Posted by AB156V6
On the website of Eibach it states literally that it fits all 147's ! (read: including the GTA)
If whiteline have 20mm that's even thicker then the Eibach (18mm)
