OBX-RS Stainless Steel Header Fitment For 90 to 96 Nissan 300ZX

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: 1.7 25mm Port Shape: Normal "O" Port ID: 1.6 1 inch Collector: 2.5" inch Outlet: 2.4" inch Main Piping Size: None O2 Bung: 2 EGR: 1 Air Injection: None Flange Thickness: 3/8" inch. T304 Fully Stainless Steel Dual T.I.G