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Kzang, Love your rig and decided to replicate it as my 550ix lease is expiring. The question I have is about power. I have always had V8's with my last several BMW's and didn't want to fork out the money for the 5.0.
If you could only purchase one, would you add the Dinan Stage 1 or the MPPK to increase the torque and exhaust sound as you noted in other threads.
How noticeable is stacking them like you did? need to clear my head on this so that one it comes in I know my moves. Thanks
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