What all has to be done to make the S4 upper turbo manifold fit on the S4 lower NA manifold. Would it be easier just to get the lower and upper manifolds? Also, If I did get the both. What would have to be done to make the lower fit?

Thanks in advance

 

Put simply. A lot. The TII LIM rises up a good 4 inches or so above the top of the block, while the NA LIM sits much lower. You would need to fab up a set of runners to connect the two.

Using both TII LIM and UIM would require making the secondary intake ports larger to meet up with the secondaries and auxiliaries on the NA block.

With either setup there's pretty much no hope of passing an emissions test, so hopefully you wouldn't have to if you try this.

 

Thanks, im not worried about passing emissions. Im already running open exhast and the rest of the emissions stuff are gonna come out when I do this NA turbo setup.