Universal stainless steel Elbow for exhaust systems BOOST Products 90° stainless steel elbow 89mm x 2mm short / 1,29D 90° Stainless steel elbow for exhaust pipes Weld elbow made of stainless steel for downpipes and exhaust systems Tight, short stainless elbow. With the thicker 2mm wall, this elbows are especially for the fabrication of downpipes. The thicker wall withstands higher temperatures which often are present shortly after the turbo or engine. Outer diameter: 88.9 mm Wall thickness: 2 mm Centerline radius: 115 mm Ratio (R/OD): approx. 1.294 Material: 1.4307 / stainless / SS304 or superior Manufacturing process: welded