A CIA usually is a good 'bang for the buck', Filter back exhaust's? It already has a dang fine pipe and the way I understand it is the muffler really does not do much, sort of straight through any way. Gauges of some kind are helpful. I run just a pillar mount pyro on mine, others have the full compliment of gauges, Edge insight is good for this with a code reader and reset ability, sort of just depends on what you want to do and how much you want to spend. For me the emissions system will stay intact probably until way after the warranty is up. I feel (Me atleast) the power it makes is great, I have no real need for more, Want more? sure doesn't every one? Deep pans and covers are always a good investment. Good luck and read on. You will get the straight scoop here on this site.

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07.5 3500 Quad, SRW, 4X4, Laramie, Leathered, Dark Metallic Gray, 6.7, 68RFE, 20K Reese, Ride Rite's, 2 Viair air compressors, Bully steps, Kleinn Locomotive air horns (5 in all), Billet polished locking fuel door, 'A' pillar mount Auto Meter Pryo, PML X-deep trans pan
06 Durango 285 RL 5'er Lifted by KZ