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I'm getting one of these installed on Sunday. Currently running 85hp with diablo. str8 pipe, cai mod. Could I run the diablo at 120 hp, and not have any problems from the alli?
 

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Since the allison is good for about 80 hp over stock, you should be okay running the extra 40hp with the kit, if you still feel slippage then you can always upgrade to an aftermarket torque converter.
 

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if you have the 6sp ally i wouldn't worry but with the 5sp i would watch it a little..
 

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If I was running a hot+2 could I run it 160hp without any problems?
yes but watch the WOT in the higher gears seeing your stock TC will hate it no matter what you do to the tranny..
 
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