I recently bought an HX40 and bolted it up. been working on my 4" exhaust. I got the flange today in the mail to weld to my down pipe, but it doesnt match up with the flange on the turbo. the flange has an ID of 4", it actually slips over the entire exhaust outlet of the turbo, which has an OD of 4". Beginning to get frustrated!!! :bang Need help finding the correct flange to clamp to the turbo! Any help is greatly appreciated!!!!!