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I have the GPI ss4 cam ported heads from a friend and had a buddy install it all no issues . Had Ryan tune it and it runs like a champ love the power . But if you don’t have someone local that’s knows what they are doing forsure get GPI to do it .
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2019 charger scatpack FBO 11.16@122
2020 CAMARO LT1 6spd 11.02@ 135 dragy approved
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