my car is lowered almost 2 inches therefore the ride is bouncy. as a result i had to change flex pipe in the exhaust twice last year. so this time i went with straight through pipe instead. the guy that did the welding disapproved and kept saying "this is what you want" "whatever makes you happy". so my question is can this change do any harm to my exhaust system or any other components... i mean does it only have to be flex pipe welded in there, and if so what are the reasons/causes my setup can have?