I put a Magnaflow straight thru on my CRD today. I expected it to be load, but it's not. A little different tone perhaps, but the engine is still louder than the exhaust. Overall, I'm extremely pleased.
http://www.magnaflow.com/02product/shopexd.asp?zone=main&id=457

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Liberty CRD - I love the smell of diesel in the morning....2005 Limited, 2.5" Daystar in Front & 2.5" OME springs in rear. Ranchos all around

Could you tell much difference in performance?

Too soon to evaluate anything re: performance or mileage. At then end of the day, performance evaluation would be subjective without a dyno run.

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Liberty CRD - I love the smell of diesel in the morning....2005 Limited, 2.5" Daystar in Front & 2.5" OME springs in rear. Ranchos all around

I thought you my have a seat of the pants dyno reading.

I added a coffee can to the tail pipe today and got another 40 HP!

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Liberty CRD - I love the smell of diesel in the morning....2005 Limited, 2.5" Daystar in Front & 2.5" OME springs in rear. Ranchos all around