OBX-RS Stainless Manifold For 79 thru 93 Mustang GT/LX 5.0L/260/289/302/351 CID, T3 Flange

welded construction for stronger hold  Accessories in photo are included  No installation instruction included in this kit, we recommend professional installation Manufacturer's Limited Lifetime warranty against manufacturer defects (Must fill out and return warranty card with a copy of the receipt and within 30 days of purchase date) Primaries: 1.6"  Port Shape: Square Port ID: 1.2x1.5"  Collector:3.5" Outlet: T3: 1.8x2.5"ID Main Piping: N/A O2 Bung: N/A EGR:N/A T3 Flange. T304 Fully Stainless Steel Mandrel bent for smoother exhaust flow Dual T.I.G