The 86 AL arms have a 22mm increase per side. If you take stock beetle arms and add the bolt on 944 N/A brakes, they will increase the width by 22mm also.
This has been measured and verified when I helped Alex out with his floorpan a while back. He has the 86 AL arms, and I have the stock beetle arms with 944 N/A brakes. Both increase the width by 22mm each side.
Sandeep
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