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anyone know who makes aftermarket front cv axles for 08 duramax? I snapped one and want something stronger then factory...

Anyone out there have any suggestions on the next step to more power? I have an 07.5 duramax with ppe hot+2 ,4"mbrp turbo back exhaust,air raid intake,and ported fuel rail fitting.It dynoed with 479hp and 830 ft lbs. to the ground. I know trans work is next thing to come but want more power...