So I just bought a stock X-Runner the other day and it seems that the front cats have failed. Rather than buy new cats, I figured why not just grab some long tube headers to replace that section? I am shopping on URD's website and can't decide on which one to buy. Are the URD Spec U headers worth the price premium over the Thorley and the JBA? I am interested in the most power increase, but I probably won't be changing the rest of the exhaust system for a while since it is not cheap and I am in California anyway. I also just picked up a K&N drop in air filter, not sure if the CAI would be worth it. Already picked up a URD short shifter, since the stock shifter is pretty garbage. For reference, I am looking at these three. http://urdusa.com/store/Exhaust-&-H...Tacoma,-4Runner,-FJ-Cruiser/product_info.html http://urdusa.com/store/Exhaust-&-H...-05+-V6,-FJ-07-09-LONG-TUBE/product_info.html http://urdusa.com/store/Exhaust-&-H...oma,-07-09-FJ,03-09-4Runner/product_info.html What would you choose? Is a ~20whp ~30wtq increase expected for all three of them? So far the truck handles great...I'm replacing an Evo X as my daily and it would be nice to make it nearly as quick and handle almost as well. Thanks!