Vibrant Performance 13640 Pie CutsTitanium Tubing Pie Cuts Pie Cuts; 4. 00 in. O. D.; 90 Degree Elbow; 6 pcs; SPECIFICATIONS: WARNING CA Proposition 65: No FEATURES: Pie Cuts Vibrant Performance Oval and Round Pie Cuts allow you to make custom bends in your exhaust pipe setup. Available to fabricate 45 and 90 degree elbows, our Pie Cuts are offered in sizes ranging from 1. 5 in. to 4 in. OD. Vibrant Performance was established in 1997 to design and produce Exhaust and Induction