Stainless Bros 4in SS304 90 Deg Elbow -1D Radius - 4in CLR - 16GA/ .065in Wall - No Leg

What you get here is a single 4-inch diameter, 90-degree elbow made from SS304 stainless steel. It's a 1-D radius bend, meaning the center of the bend is one diameter away from the tube's edge, giving you a fairly tight turn. The wall thickness is 16 gauge, which is about .065 inches, a solid choice for exhaust work. This particular elbow doesn't have any 'legs' or straight sections extending from the bend itself, so it's a pure 90-degree transition.

This kind of piece is common in custom exhaust builds or repairs where you need to route tubing around obstacles or create specific shapes. SS304 stainless is a popular material for exhaust components because it holds up well to heat and corrosion, which is important for anything under the car. The 16-gauge wall thickness offers a good balance between being strong enough to handle welding and vibrations without being overly heavy.