Alright this review is long over due. So for some background I have a 2011 Crewmax. I installed a magna flow dual in dual out same side exit exhaust. It sounded great but the drone was horrible. So after reading about all good things about the BAMuffler, after months of going back and forth...
I have been gathering numbers from different sources, and it looks like the 1-3/4" cat-less ARH Direct Connect header system for the 2007 to 2009 5.7L would add 20 to 25 hp as a stand alone mod running the factory cat-back exhaust. Your thoughts.
Disappointed. I received my 2010S JBA shorty headers and examined them only to find burn marks on the exhaust ports. They were not smoothed for proper air flow and not even close to the proper shape of the exhaust ports on the heads. Waiting for response from seller on ebay.