Exhaust Flange3-Bolt Stainless Steel Flange3-Bolt Stainless Steel Flange; 3.5 in. I.D.; Single Flange; Retail Packed;SPECIFICATIONS:Material: T304 Stainless SteelThickness: 3/8 in.Engine Make/Size: UniversalPort Size: 3.5in.Finish: MachinedProduct Width: 4.82 in. Bolt Circle: 4.46 in. Matching Tube Size: 3.5 in. IDProduct Height: 4.69 in. FEATURES:T304 Stainless Steel3/8 in. ThickPurchased Individually1 Year Limited WarrantyVibrant Performance Stainless Steel Exhaust Flanges are available in sizes ranging from 2" to 4" I.D. and a choice of 2 and 3 Bolt configurations. All Flanges are 3/8" (10mm) thick. They can be purchased individually or in cost effective boxes of 5. Vibrant Performance also offers a 4 Bolt flange for oval tubing in sizes ranging from 3" to 4" nominal oval size.Vibrant Performance was established in 1997 to design and produce Exhaust and Induction components for the Sport Compact