The stock manifolds are very good. They are welded stainless, not cast, and are high quality. I don't headers like the JBA will help any by themselves. Most people make other changes when installing the JBAs, such as removing the rear cats and installing a new exhaust system. I think you will see the same gains if you made the same changes, but still use the stock manifolds.Cillyone said:
JBA hookup!
In my search for speed, I noticed that the only headers available for the Armada were the JBA's, they also have an exhaust system for the titan, but nothing listed for the Armada. Thats when it hit me that JBA is located close to where I live. So I called and spoke to one of their managers about test fitting an exhaust system for the Armada on my car. He seemed very optomistic about producing a system for our vehicle. He said that in a few weeks when their R&D got caught up he would set me up with an appointment to get fitted. Of course for being the donor vehicle, I will get a free exhaust system, plus he said he would give me a good deal on the headers, and install for them 
. Note: to install the JBA headers you must weld on to the existing exhaust.
I don't want to be to optomistic, but hopefully they will follow through. This also gives us a great chance to give them feedback on what is most important to us in an exhaust system. The manager was wondering if I though Armada owners would perfer a stainless system, or an aluminized. I thought that I would pass along any prefrences to him. It seems like to most people the cabin drone is one of the biggest factors in their exhaust purchase.
I will post back when I get an appointment set up for the fittment.
. Note: to install the JBA headers you must weld on to the existing exhaust. I don't want to be to optomistic, but hopefully they will follow through. This also gives us a great chance to give them feedback on what is most important to us in an exhaust system. The manager was wondering if I though Armada owners would perfer a stainless system, or an aluminized. I thought that I would pass along any prefrences to him. It seems like to most people the cabin drone is one of the biggest factors in their exhaust purchase.
I will post back when I get an appointment set up for the fittment.
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