ppritchard

What is the difference in the regular UIM and those that have raised
stamped letters like 13B on the top? I've seen member's pix with at
least 3 different versions?

thanks

GoodfellaFD3S

iTrader: (213)

The JDM UIM is similar to the USDM one but is missing the AWS so less block off plates are needed.

You're probably referring to the 13B-RE UIM, which is from a Cosmo, not from the FD. In order to run it you need the matching LIM. I don't run it b/c I want to keep my GZ LIM, which isn't compatible with the 13B-RE UIM.

Makes sense? Lots of acronyms in there

Sgtblue

iTrader: (16)

Does the 13b-RE combination flow significantly better? Any other issues with compatibility with the FD systems? Just curious too.

purerx7

iTrader: (61)

From what I have read on here and have seen personally, the 13b-re does flow slightly better. Since the UIM has longer runners you MUST have the re-lim for it to be bolt and go (basically re-alliterating what Rich said). The parts really arent that expensive, and they look amazing polished, however, IMO the money could be spent better elsewhere.

Prometheus

iTrader: (2)

The 13B UIM has much larger and slightly longer runners, it also has a parabolic chamber (allows the air to tumble before entering the runners)

The RE UIM was designed in nature to have better bottom end torque.

I'm currently doing the conversion (with a twist)

The RE UIM mates to the REW TB, but leaves a small gap that needs to be filled with weld or devcon putty.

It may be a better stationary modification, but I agree with Bryan (money could be better spent)

The main reason I jumped on this project was vanity.