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04 vy v6 s pac issues

Mitch469

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Jun 3, 2016
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Melbourne
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Holden vy spac
Sorry to steal the spotlight I have a 03 vy spac and it's near completely stock iv just got a cat back and an enclosed pod filter and running 20" s and it goes pretty hard spins the rears quite well I'm currently changing the engine to a s/c l67 with a 10psi pulley mainly due to high kms and want a little more power but iv put this car through its paces and it's stuck with me but hear is my question does anyone know if the stock auto gearbox will handle the increase in power?
 
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