The Milltek Sport Primary Cat-Back range replaces all OEM exhaust components after the primary catalyst assemblies and removes the secondary catalysts. This creates a freer flowing system with improved sound and throttle response. - Replaces all OEM parts after the primary catalyst assemblies - Removes secondary catalysts for increased flow - Improved exhaust sound and throttle response Specifications: - Pipe Diameter: 76.20 - Race Product: No Kit comes with: - Y Pipe - MSNI104 - Connecting Pipe - MSNI106 - Link Pipe - MSNI107 - Rear Silencer - MSNI108 - Polished GT (round) 127 Exhaust Tip - MSNI109 Vehicle Compatibility: - Nissan GT-R R35 2009-2015