I would like to know if I could use the back door inter-cooler with the neukin manifold.

 

I personally have the crfab but as far as the ramhorn style manis I think they all will work with a backdoor .I also wanted to run that type of intercooler but decided not to because as far as I can tell they dont sit centered in the front bumper.If you dont mind the cooler not being centeres then you should be ok

 

yes you can run a backdoor style with a neukin manifold