These high quality round catalytic convertors are designed to meet Federal USEPA requirements and will work for a wide variety of universal applications. Features include a compact 4.00 inch diameter x 8.00 inch long spun outer casing for ease of fitment in tight spaces along with high flow 200 Cell metallic substrate internals for severe-duty/high temparture uses. These 2.00 inch inlet/outlet convertors are for Pre-OBDII applications and can be used for high performance applications and come with a 5-year/50k case warranty and 25k mile emissions warranty for long lasting durability and performance. These convertors are Not Legal for Sale or for Use in California and may Not be Legal in States that follow CARB regulations.