AMS Performance 2009+ Nissan GT-R R35 Alpha 90mm Midpipe w/GESI Cats - 90mm ExitThe Alpha R35 GT R 90mm Race Midpipe is one of the largest midpipes available on the market. Where most systems implement two 76mm (3?) pipes that merge into a single 76mm (3?) primary pipe, we offer a larger 90mm (3. 5?) primary pipe to optimize exhaust gas flow. This reduces turbulence and unwanted back pressure freeing up horsepower and improving turbo response. This Part Fits: Year Make Model Submodel 2020 Nissan GT R 50th Anniversary Edition 2009