What is the differnce? they look the same? I have a s4 and just bought a s5 hotside/ bnr stage 2 it looks like my s4 flange/ downpipe will work. the bolt pattern looks the same. Will it bolt up and seal if I use the s4 gasket? Or does the s5 gasket seat diff?
<br>
And what are the holes under the exhaust ports go to? On the old s4 turbo manifold and the s5 you can see where it hits the exhaust manifold and you can buy new gaskets with the holes in it. I have a gasket that don't have any holes in it. Can I use that gasket? It looks like the manifold blocks it off anyways.
<br>
And on the bolck off plates. What all can I block off? I'm still running stock ecu and didn't know if it wouldn't run right? I have the egr vavle out and don't plan on putting it back in ever and want to get rid of all the emissions. Don't drive it much on the road anyways........................................... ......

 

they are the same