? about exhaust leak

If my downpipe is leaking slightly would that hurt performance much ??
I dont know if i will be able to replace this gasket anytime soon but i want to hit the track 1 last time before i put the stock DP back on. I just dont like how it sounds when i floor it… like gargaling marbles.
and the rubber exhaust hanger below the car is missing 1 loop so i wire tied that untill i can get that covered under warrenty

the exhaust leak is after the 1st 02 sensor and before the second.

what car?

on the grand prix it could make you run rich

on the gtp ! im going to try n tighetn it up tonight. If not ill prolly just wait untill i tear it off