These are universal exhaust bends, made here in house at ZZPerformance on our mandrel bender. Full 4" OD bends made from 304 stainless steel. 

45° bends come with approximately 8" of straight on each end. 

90° bends come with approximately 6" of straight on the short side and 9" of straight on the long end. 

These bends are meant to be used for customer fabrication projects and do not include any sort of additional tech support or extras like end expansion etc. Straight measurements are approximate and may come in above or below our stated values. Sold individually.