I broke the welds holding the 4 pipes together. I cut slits in each pipe, swedged in the inserts that came with the pipes and used these clamps
http://www.jcwhitney.com/autoparts/P.../p-920/c-10101
STAINLESS STEEL BAND CLAMPS
Look better and outperform conventional muffler and exhaust clamps
304-stainless steel withstands high heat and resists rust, corrosion to look better longer
Creates a 360° leakproof seal
Securely hold exhaust pipes without crushing them—no restriction of smooth exhaust flow. Constructed for all exhaust systems. 3" wide band clamp completely covers exhaust pipe joints. Hardware is pre-attached for easy installation. Grade 8 bolts included for a vibration-resistant joint. Choice of 4 pipe sizes.
Roscoe