Believe me Auusie, I didn't sell my soul for these mufflers. I searched everywhere and could not find anything that would fit in the tunnel. These mufflers are 4"x6" ovals. Anymore than that and I would have had a problem. Less than that would not have given me as much sound absorption Also, I needed the length since the cross-section is not very big. The closest thing I could find was the Bullet resonators, but they are 4" rounds. The price for these mufflers was about $75 each including shipping. That's not too bad and they fit perfectly.
