| Options, on the other hand, are out there. Obviously you know about Greg Dupree's. AntonioTSP of Top Speed performance has a prototype of his own design, in his car now, that is not a log manifold like GD but is more like the Pentroof equal length style. Another contender is Mike Smith. He has designed a cast manifold that will apparently outflow TD05 manifolds. Finally, Z1 is working on manifolds of their own. Only Greg Dupree and Antonio have listed prices. Antonio's were less because he did not use iconel. I'm personally waiting to see Mike Smith's cast manifolds. They will not be as prone to cracking and will more likely than not be a little less expensive than the others. A secondary source, who is close to Mike, said that they could be ready by Christmas time.
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