I know i'm abit late in your case, but these band clamps look like they would help without harming the flow too much. I think i might swap mine on my own using these.

http://borla.com/products/product_multi_detail.aspx?cat=2&type=7&desc=Univer sal+Mufflers%2c+Tubing+%26+Hardware|Stainless+Band +Clamps