A lot of people have been looking for Mandrel Bent Exhaust and header flanges of late. The Mandrel works more like the flexible straws that you can purchase in the grocery store. When the straw is basically bent, the flexible section of this straw actually expands for maintaining the round opening, no matter how much of the angle the straw is actually bent at.
When the exhaust or the downpipe is usually manufactured with mandrel bends, the steel will be allowed to stretch well on the outside of the bend and then compress on the inside of this bend, thereby maintaining a pretty nominal pipe diameter. Exhaust gas also follows the fluid dynamics. You will need to eliminate the back pressure and maintain the exhaust gas velocity. The Mandrel bending also lets the hot exhaust gases to flow with little turbulence.
With a Mandrel Bent Exhaust, you can actually build a customized exhaust system with the set of assorted mandrel bent exhaust tubes and pipes that is available online. There are so many varieties that are available like the mild steel and also the stainless steel exhaust.
The stainless-steel exhaust tubing is an unlimited combination of the bend angles, lengths and radiuses for fitting the space constraints. Many of the stores let you pick from the 2 inch and 3 inch to even 5 inch diameters, and also a range of sizes in between for creating that perfect balance of the exhaust flow as well as backpressure for the engine.
As the demand for these products are increasing, you will have an advantage of choosing the least expensive one from the top brands. The competition is also high for this product and this will make the process of picking a high quality product at a cheaper price.