Hello, While standing behind the ideling 78' 308 GTS today I noticed that if I put my hand by the two left exhaust pipes I feel a pulsating exhaust flow while on the right side I feel a very smooth even flow. About a year ago I got one new cat...should this be a concern? ODOR... While going down the road (not at very high rpm's but fully warmed up) I detected an odor...not gas...possibly clutch?!?! (was doing "city driving") Got a new fly wheel and clutch kit two years ago. Any help will be greatly appreciated. Yours, Tom