This is an optional M2C RC8B3 Rear 1/2° Toe Offset Bushing Set. Made from delrin material, these bushings are designed to give you 1/2 degree offset in a plus or minus direction. They can also be used to raise or lower the roll center; this setting will be for the stock position only. The dot indicates the direction of offset.
This product was added to our catalog on September 26, 2016
Not recommended. These are labeled as to work with the stock blocks but they are too small. Not only do they fall in and out (loose fit), they seat too far into the block, protruding 2mm out past flush so as a result you have 4mm less engagement of your hinge pins if using these on both blocks together. You will rip the a-arms out in a crash. Lastly, it also doesn't mention that the four pieces included are all offset in the center, so if you want corner offset you're beat. Go with the Ghea set, much more $ but they fit properly.