I have the GMS1-specific Hahn lower CP, and I believe that since I installed Powell's rotated mounts, the lower MAP sensor connector interferes with the AC connector. The latter rubbed all the way through and I can't seem to find a position for the lower CP where the two connections don't interfere with one another... Here's a picture of what I'm dealing with. I tried re-positioning the lower CP on both ends, but the "play" doesn't seem to be enough for the connectors to clear each other. Any ideas??

As seen from the top:



As seen from the bottom:

 

I would suggest rotate towards the rad shroud you can slot the rad shroud for more space. We have done that on some early hahn pipes.
Later pipes I have installed dont seem to have an issue.

I talked to Hahn about it, he has no clue about rotated mounts, and no intention to do anything as he pre makes syatems in batches; so just like his exhaust systems that crash into the rear beam, you are on your own to figure out a solution.

 

1) Remove Hahn lower charge pipe.
2) Throw Hahn lower charge pipe in trash.
3) **** on Hahn lower charge pipe.
4) Re-install stock lower charge pipe.
5) Drive away happy and P0236-less.

 

Thanks John! I read about turning the sensor around but I don't like cutting up the fan shroud; I thought this was why the modified lower CP was designed, apparently they didn't move the sensor over far enough... I might just end up getting another brand lower CP, or (short term) go without AC...I've been doing that since spring and the worst heat should be over ;-)

 

ZZP charge pipes fit well. stock works for me as well, but the plastic nipple can break off if folks pull on it.

 

its funny how a few years ago everyone was all like "zomg hahn is so high quality awesome!!!"

i run the stock lower cp. no problems for me.

 

lol at pissing on the Hahn lower CP

I actually might just throw the stock pipe back on. I've been getting a **** ton of P0236s lately...
Reason I replaced it was that I heard from two people that blew the plastic piece on it running E85. I guess it's time to put that theory to the test...

 

My stock upper pipe survived 27psi spikes and steady 25psi on an E85 tune for almost 6000 miles. It was fine when I took it off and replaced it with an Injen. I'm sure the stock lower pipe will be ok.

 

i have ran 29 PSI with the BNR through the stock lower CP. its not going to blow.

 

Yeah I think I'll slap it on one of these weekends. I'm running a 26PSI Terminator E85 tune, and have managed to explode (implode) my vacuum tank at a track day already (which I've since bypassed on track days) We'll see how the stock lower CP holds up...