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Message: [QUOTE="Highbeam, post: 518109, member: 23735"] Don't do it. I have the same truck. All those improvements only take place at higher rpm and wide open throttle. I admit, the sound improvement of the fipk would be nice and getting rid of the excessive intake plumbing would clean things up under there. Your best bet is a set of long tube headers and a more efficient exhaust, muffler only as the rest is adequate. I would try to find stainless steel exhaust components as the salt will kill anything else up there in the mountains. If you want to get in to the motor, a different camshaft would free up lower end and mid range power. This seems too serious though. Once you are satisfied with engine output and you still lack pickup, time to regear. The stock gears, probably 3.73, are pretty high. The overdrive gear is pretty high too so you can afford to lose some top speed especially if you have added larger tires. [/QUOTE]