These blocks are made using 7075-t6 material and polished. this is an optional block that is set at +1 degree off center from the stock block. Mugen offers the stock setting and a +2 degree offset.
Our testing has shown that the +1 block offers a nice medium between the stock blocks. We also offer +- 1/2 degree(p.n 5926) and a 3/4 offset+- (p.n.5927) for different antisquat bushings.
If you have any set up questions about these blocks contact Josh Hollifield on face book.