Did you sell your WBR header? I have made another header. It is still equal length. Instead of merging the tubes into one pipe, Their are two tubes up to the turbo flange. The two 1 5/8 tubes merge to 1 7/8 at the turbo flange. It has an o2 bunge, but no egt. and it is uncoated. If you can send me the WBR header I will send you this new one at no charge. Your testing, and my desire to have a long standing relationship with you, could lead to future, testing of WBR twin scroll turbo kits. Let me know if your interested.