GRP has been producing on-road "fast tires" ever since the the beginning of mugen seiki line of cars ( MRX, MTX, and the K2-X avance ). Kawahara ( Zac Project) was a product line that offered "up-grades" for mugen seiki cars which was distributed by mugen seiki. So, with GRP " putting a lot on the line ", I don't think GRP has nothing to lose but to go up in production with companies such as mugen seiki.