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11-20-18, 10:28 AM
Installing a full Kooks exhaust on our 2018 Mustang generated up to 55 additional horsepower before tuning with no other additional modifications

Click to Read Full Story... (http://www.mustangandfords.com/how-to/engine/1811-kooks-headers-2018-mustang-exhaust-system-adds-55-hp/)