Originally Posted by
Rear Admiral
bukil: The 1 prefix on the sus blocks really doesn't mean anything -
The prefix does mean something. There is an A block and a 1A block. The prefix "1" means it sits 1mm shorter/lower. This was introduced on the TRF415 while the Evolution cars still used the standard height blocks. My TB Evo 3 & 4 use the taller blocks without the prefix. As you can see in the photos, the A block is obviously taller...
A block:
1A block:
PS: The reason for the change was to allow a lower roll center. To raise the roll center, with the 1A block, you simply add shims below the block...