I couldnt tell you about the quality just from looking at it. I'm not typically one to be negative about any new products for the L28, but those claims are ridiculous!
"STOCK TURBO, PORTED HEAD, PORTED INTAKE, WITH 9LB OF BOOST AND MADE 317HP TO THE REAR WHEELS"
a stock zxt motor makes what, 160hp? wow, 2lbs of boost, port work and that manifold produced 150+hp?
"HEADERS HAVE MADE OVER 800HP ON FULLY BUILT MOTORS "
and those cars would be . . . .where?
Anyways, it would be nice to see someone get some REAL numbers for one of these . . .