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Non-resonated systems are a little louder but offer the best power gains and are still engineered not to be excessively loud
being vastly stiffer and lighter than the original calipers
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eventually causing power drop and gear selection issues
Free-flowing exhaust (3" turbo-back advised)
Genuine Ford Focus MK3 RS Spark Plugs set of 4 - 2.3 & 2.0 Ecoboost Suspension & Chassis Non-resonated systems are a littleGenuine Ford spark plugs for MK3 Ford Focus RS and popular upgrade for MK3 Focus ST250 Sold as set of 4
US$ 389.98
US$ 139.97
US$ 199.95
US$ 649.50
US$ 199.50
US$ 194.97
