This was one of the reasons I changed my 3" to 2.5". I hit a bad speed hump (think black bitumen when that's the road) which I missed the sign for going about 40kph when it needed me to be at 15 to go over it without damage. Caught the middle muffler and stretched the exhaust - ended up rubbing on diff rubber doughnut coupler up hills or in reverse!
This was one of the reasons I changed my 3" to 2.5". I hit a bad speed hump (think black bitumen when that's the road) which I missed the sign for going about 40kph when it needed me to be at 15 to go over it without damage. Caught the middle muffler and stretched the exhaust - ended up rubbing on diff rubber doughnut coupler up hills or in reverse!
As you discovered, the 2.5" didn't cause a power loss and I believe to run a cumbersome exhaust, it needs to make more power to be worth the impracticalities.