I have the Vetterman exhaust that came from Vans. There are sections labelled 2 and 3 (for cylinders 2 and 3) that fit together with slip joints and locking pins. These are welded to straight sections for cylinders 1 and 4. The ends of these sections are wider to accept a slip fit to sections 1A and 4A (that have to be trimmed by 1 inch for the O-320) that attach to the cylinders. But there is no mechanism for locking these slip fits (i.e. section 1A just slips into section 1, with no locking pin. Similarly for 4 and 4A). Am I missing something? How do these sections get secured together?
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