I bought a f-150 limited and was wondering what would be the best dual exhaust,air intake and programmer to get? Really happy with the preformance so far,just thinking about adding a little more horsepower. A buddy of mine mentioned about getting a super-charger for it, but like to try these steps first. Thanks for any comments. The only thig I have done so far was added an undercover tonneau cover and husky floor mats.