Frontier Exhaust Systems

I had a Gibson system on my 99 F-150 and loved it! I put the Bank's on my Frontier and removed it 2 months later! Don't get me wrong, i's a very well made system, but it was too loud for my taste! I also felt a loss of low-end torque with it. JBA is coming out with a new system that uses the stock pipe sizes with a free flowing 'Y' and muffler. I'm waiting to hear some comments on this system before taking another plunge into aftermarket exhaust! Another member of these forums (don't recal which) was told by a performance exhaust shop that 3" pipes are too big for this engine. He was also told the drone that was so loud with the Banks system was partially due to that large of a pipe! The MagnaFlow site also lists maximum pipe size per cubic inches of engine displacement, and that chart showes 2.25 to 2.5 as the maximum size for these 4.0L V6's. The Gibson system has a resonator built into it's design, and their muffler is not straight through like the Banks, so it probably retains a certain amount of back pressure necessay yo maintain low end torque. There are several members on this and other sites with the Gibson system, and I've not seen any complaints at all! No negative comments about loss of low end or excess noise. I don't know the size of the pipe from the CATS to the 'Y' on the gibson, but it's advertised as a 3" system. The Rev or others who have it may want to comment on the pipe size. But I do know the Resonator really cuts down on the noise in the cab! MagnaFlow and Stillen also have systems on the market for our trucks, but both the MagnaFlow and Stillen require you to cut the stock system before the muffler and had a new muffler and tail pipe, but retain the stock restrictive 'Y' pipe! Hope this helps...