I searched and searched. People have stated there is problem with the duo, but I have yet seen anyone actually state the actual problem. I've used the search and have no luck. Can anyone here help me out and actually state the problem?

 

I have never heard of such a problem.

 

Search alberto... he tested and measured and a 10rwhp gain after switching out to JWT popcharger w/ the Injen intake he had.

 

The only problem that I see is Crawford dismal numbers from Sport Z magazine plenum vs plenum spacer shoot-out.