Just wanted to give you my quick review on my PNP Exhaust Manifolds with a Grimmspeed X-Over. All I can say is WOW, I truly missed that boxer rumble. From the short drive I ahve done with them installed, I can say these seem to have a little more torque than the EL headers I had on. Probably on par with my UEL 3 bolt header. If I had to rate the manifolds I ahve had on my car in the last month it would go like this. 1. Maddad V2 UEL Header with 3-bolt Uppipe 2. PNP Exhaust Manifold with Grimmspeed X-Over 3. Ebay EL Header I am thinking the 3-bolt UEL header produces more power with a bigger turbo because the tubing of the manifold runners and uppipe are huge. I think the EL header would probably work best with a stockish sized turbo. I think the PNP Stock is pretty close in power to the 3-bolt header. If Iw as going to stay with an IWG Bigger than stock turbo, I would get teh 3bolt header. Everything else I would get the pnp manifold with xover pipe. I got my manifold ends done by Mycues1982 on nabisco. He is cheaper than grimmspeed and his produtcts look to be better than grimmspeed. If you want my maddad 3-bolt manifold/uppipe, I still ahve it for sale. If it wasn't for the fact that I am prototyping Matt's rotated kit, I would probably put it back on my car.