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well i don't know any prices but the diablosport,bullydog,ppe,edge and the efi live are some great choices for some mileage and some ponies,i run ppe and i love them i gained almost 4mpg.....something else if you run more then 150hp you would better look at getting some tranny upgrades..the best one for the dollar i believe is the diablo,and efi live is the best one it will tune any duramax out there but it is't for your every day kind of guy etheir...here is a web site that will give you some info on efi live http://www.crankitupdiesel.com/efilive.htm hope this helps you there..
 
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