I am working on a 318 Magnum (EQ) headed engine for a limited circle track class of modified. I tested the heads with the Hughes 1.92" intake and the 1.625" exhaust 8mm valves. I only bought one of each to do the mock up of the head and to see what they looked like.

The valves appear to be of decent construction. My question is has anybody used them before? What were your experiences? One of the main reasons that I ask is the low price. I would hate to lose an engine due to an $11 valve failure. I would hate to lose it to a $20 valve failure too. I just don't have any history with these valves.

Thanks!