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I wouldnt wanna run duals on an I4 just due to the added rear-end weight and the loss of backpressure... you are losing torque, and your NA engine isnt producing enough gains to make up for this lost torque at high end... I would just put a single 3" Greddy or HKS system to the back... and since it is a "Y" Pipe and not true dual, it adds little to no performance gains and lots more weight... just my thoughts...
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yeah, its that big
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