Thought this article was interesting as it sums up what each cover can withstand.
http://www.jpmagazine.com/techarticles/drivetrain/154_0708_bulletproof_test/viewall.html

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Alec
1987 Jeep XJ
The Build Thread
Chincy 2" lift for now
31x10.50r15s
HPD30 front and D44 rear

Bullets?, who is running from someone shooting at them, no real world application

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O6 Limited CRD 4X4, Frankenlifted II, Magnaflow, EHM, ORM, 245/16 BFG, AllJ's Rear Rack, Lightforce Aux Lights, Tjm front bumper, Tmax winch, Scorpion diesel tuner and Baja Tested.

What? It's a comparison showing which diff cover can handle the most abuse and which is the strongest by shooting at them.....

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Alec
1987 Jeep XJ
The Build Thread
Chincy 2" lift for now
31x10.50r15s
HPD30 front and D44 rear

You must not of seen the recent polls. Libertys are the most stolen SUVs for high speed drug pursuit. And the Cartels use them. So you must find a diff cover to withstand a bullet. Pretty decent test if you ask me.....iphone5 vs samsung galaxy vs htc one. We will see which one is combat ready hahahaha

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2002 KJ Limited 3.7, 5.25" lift via coilovers, custom HD rear springs, 32.2" tires on moabs (soon 33s) 4.56/JBA diff, OX lockers front/rear, NP241OR, Parker Fab front/rear bumpers, rock rails and roof rack, Viair OBA.

2006 KJ sport 3.7, 4" Ironman lift, 32" tires, Parker Fab front/rear bumpers and rock rails.