If i get the 2.5 inch zzp downpipe with the magnaflow high perf cat what would this affect. How would it affect the gas mileage and how the car sounds? any thoughts of how much hp this would really add. The car is just stock. Thanks
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03-26-2011
If i get the 2.5 inch zzp downpipe with the magnaflow high perf cat what would this affect. How would it affect the gas mileage and how the car sounds? any thoughts of how much hp this would really add. The car is just stock. Thanks
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