I was inspired after seeing Aaron Cake reusing the stock 6 port LIM and building a custom UIM, so I'm exploring some options that also reuse the 6 port LIM.
Right now I am running all s4 na intake manifolds, and with the TID and both IC pipes (all 2" dia) on the passenger side, its a little crowded.

My plan is to use a turbo (T2, REW, or RE) UIM and build a runner extension between the UIM and LIM.

Im thinking the easiest route would be to use the T2 UIM as things like the TPS would still be compatible and I think I could still use the stock ECU (Rtek 2.x) whereas if I used the REW UIM it would be a little more difficult than that.

Any thoughts or input would be greatly appreciated.

 

FD upper and throttle body with a Spacer.(big write up/Inquiry started by Me,with info by numerous Gents that are doing it,have done it ar want to!).

 

I think the easiest route would be to use the TII LIM Cutting off all the unecessary stuff from the NA LIM and re-welding it seems like a lot of work when you can buy a TII manifold set for -$200.

 

like the last guy posted, its the LIM that you want and the UIM, but you have to match port. but if your doing that, might as well get a FD LIM and UIM then match port them. i also forgot but you can try to look it up, there was a test on FD intake manifold vs FC T2 intake manifold. there's some ups and down... look into it.

 

FD LIM is garbage. stay away. the manifold was designed mostly with packaging constraints in mind. they are well known for their assymetric design as well as leading to lean conditions on the rear rotor, which is why FD guys try to get aftermarket LIM's.

stock FD LIM vs the aftermarket one (Xcessive manifold):

 

How does the REW upper intake compare to the RE?

 

From what i've heard the RE UIM flows much better.

If paring the Xcessive LIM with the RE UIM, that would be a match made in heaven

 

How does the RE throttle body compare to the REW throttle body?

 

Does anyone know if the s4 na LIM runners are equal length (not that they are very long anyway). I seem to recall that the runner to the front secondary port was slightly longer than the rear.