R32 R33 RB20DET RB25DET Turbo Downpipe Elbow Outlet Dump FITS Nissan Skyline Nissan Skyline GTR R32 R33 This item is compatible on RB20, RB25 with T25, T28, GT28, GT3076 turbo model. Power improvements are design & placement of the collectors to even out the exhaust pulses giving it an up to 5~8 HP increase. By maximizing exhaust flow which Superior 2.5" design will improve turbo response and response TIG weld 3/8 thickness flange.