Our plastic is a different compound than Mugens. Mugen is stronger when it is cold because they use less fiber. Ours gets more brittle as the temperature gets colder, but when it is 60 or above (most real racing temps) ours usually wins in the collision battle.

To be honest, some of our customers buy Mugen plastic parts for winter racing and some Mugen customers from Florida and Texas and other southern states buy our plastic parts because they are cheaper and stronger in their environment.

We also have new lower arms that have less fiber in them that we have been testing. They are the JR-0131 and they seem to take care of the problem as they are much closer to RPM plastic. However, the last thing I want to do is have to carry 2 different sets of plastic. But since we switched to the new plastic compound, it is 1000 times better than the original plastic.