Well i have a civic 8th gen( reborn) and its odo is 81k kms..I notice that while starting the car in the morning the exhaust sounds throaty and heavy as if something is obstructing it..if i go near the tail pipe the sound comes as puffffff not a constant exhaust sound..when the car warms up the noise becomes smooth..i havent till yet ever got the cat con cleaned..Here are my questions:
Could all the symptoms be due to a chocked cat con?
Do honda 3s clean the cat con and how well do they do it and how much do they charge??
Could it ne some other thing other than the exhaust??