I need more power for my 250 AC 2X4. It dose real good with the stock Titan 489s(24x9 in.), but I got a set of 25x12.5 Super Swampers and that hurt my take off and low end power considerably. It does all right if the RPMs are kept up, but I can't keep them up all the time (gladd it has low range). I wanted somthing to just bolt on and not require taking the engine off and a mechine shop. Boner gave me some good ideas, like a universle supertrapp exaust and 300 AC K&N filter. Most of the time 300 AC parts will fit, any ideas? GO TO WHO WANTS WHAT, by BONER, AND MAKE YOUR SELF HEARD!!!