I am no authority or anything but I thought I'd share my views Between the 2006 Si manifold and the 2007 Type R manifold


^Something I forgot to add, the overall length or height is shorter on the RRC, so this means that the runners are shorter but in this you can see they are straighter too.

 

Any difference in performance?

 

Sorry, this was for a customer in the UK. If I had performance results I definitely would have posted them up and excluded the "A visual comparison" title. Hopefully soon I will when I can find an all stock 2006 Civic Si to test on.

 

I bet they are pretty close in performance. I bet the type-r is maybe a hp better since its for the type-r and they did more R&D

 

Hey that was great info. I would also like to know if there is a difference too. There is quite a bit of difference in appearance when put side by side.