Originally Posted by Bullet Ride
The TCD manifold is actually pretty decent, and if you think combining two stock log type manifolds with an adapter is better I think you're mistaken. The TCD manifold also has an external wastegate which gives more options for upgrading the turbo. Dinan has the luxury of being able to charge a premium for their products because they don't void the factory warranty.
The point is that you're trying to make your kit sound like an amazing deal for $2500 because you're saying that to buy something similar would cost $10,000 which just isn't true. I think that $2500 for this kit is a fair price, but not amazing.
The stock cast M20 manifolds actually flow really well. There were some discussions about this in other forums years ago.