DNA Motoring HDS-F429 Stainless Steel Exhaust Header Manifold Bbf universal Shorty headers (pair); huge 2" Stainless primary tubes CNC mandrel Bent pipes for excellent flow; professionally tigged welds 4 to 1 header design Includes gaskets and collector Bolts Header inlet/outlet: 1.5"X2.0925"(Oval)/3.375"/ 0.375" thick flanges/ 2.5" collector Reducer included