im runnin 37s on my xj with 9 inches of total lift (short arm for now) locked front and rear, 8.8 in rear, super 30 upfront, k&n intake, flowmaster exhaust, ss brake lines, etc. now i want to work on getting the engine up to par with pushing the big ass 37s. im looking for better acceleration and torque for on the trail. better gas millage is a plus but not neccesarily my biggest concern.ive just noticed a decrease in response time off the line and me to give it the skinny more and more to make it up big climbs which is fine but i want more shit under the pedal and the hood