This is the exhaust/turbine housing only. Large 1.06 A/R, T4 (T04) undivided inlet (exhaust manifold side) with 3.00" V-Bnad interlocking "LIP" exit. (downpipe side) Fits Garrett GT35R (GT3582R, GT3040R) turbos. Direct bolt on & replaces/upgrades your existing housing.