5k?? Why you going to a manual?? I don't think the 2. 8 chargers can move enough air to support the cummins at 5k. Of course you could get one and bush it down. Also you have a automatic, just grab another gear. Unless your going with a wild cam and a huge charger, I don't think 5K is the answer. Most of the guys that turn 5k only use if for building boost. Running down the track they are probably around the 4000-4500 mark. Of course I could be way off, this is just stuff the little voices in my head discuss in their free time. But think about it, another 1k is 25% more air that is going to have to go thru the engine and charger. I see plenty of heat now and I have noticed I don't have an egt issue under 3300 or so. I get up around 3800 while pulling and I read 1750 on on set of probes and the BD xmonitor always reads 1873 exactly. LOL. What kind of deals can you get on the fluiddampers??