There's for sure some meat on it for porting. I compared it to our stock manifold and the runners arent alot bigger, but they are fore sure smoother. I think this manifold can be a great upgrade for stock turbos, hybrids, and those with the ATP turbo kit. I think for really big power, the quickspool DHM kit is still the way to go.
Did a mini test fit and it for sure fits on the head and clears all the manifold studs.
Plan right now is to 100% finish my tune and get the manifold on my car and get some numbers. Here's to my fun weekend! Right now I am tuned on 93 only. I hope to get some e85 in here this weekend to see what the car can do on it. Currently im making 189/268 wheel on our heartbreaker mustang dyno (stock Fist made like 160/195). I had another fiesta customer tune on our dyno and go to a dynojet for numbers (same tune, same car, same corrections) and there was a 15% difference, meaning id make 220/315 on a dynojet ;] (id admit it may be a little inflated)
Theoretically, I am hoping for a slight bump in top end power (less exhaust reversion from bigger and longer runners) and hopefully little to no loss of spool with gains all around (on stock turbo). With these little turbo's we see tons of exhaust backpressure. I just put our big turbo kit on a mazdaspeed 3 and we made the same power at 13psi with a better flowing manifold than we did at 19psi on stock manifold. Same theory. Less pressure in the exhaust manifold will improve volumetric efficiency.
stock manifold looks like a stainless closer to 409, where as ours is 304. Not to mention the heatshield (what those bungs are for) will get rid of that terrible stock shield, and look better doing it. for reference look at our focus atmosphere kit heat shields.