[Vestro86]

New to the forum posting but have read and done searches. Aren't there an issue with the larger opening of the lower and matching it with the proper upper? I know the flow and volume of the lower is larger but wouldnt that mean the port opening would be smaller on the upper? Everything I have searched and read(Even off Overkills site) is that there is no need to port the upper but just wondering if it's worth it to buy the entire manifold setup. This is on a 2011 btw.

 

[Sleeper200c]

I believe just the bottom ports where it goes into the cylinder head is bigger. no need to change the upper. doing mine in the spring ill post the results here.

 

[Vestro86]

I believe just the bottom ports where it goes into the cylinder head is bigger. no need to change the upper. doing mine in the spring ill post the results here.

Ah ok. That makes a little more sense. The picture in the first post made the top opening appearance seem bigger to me also.

 

[GLHS60]

Has anyone done anything with the exhaust crossover Y pipe.

It looks terribly torturous but possibly not as bad as it looks.

Thanks
Randy