First ticket

Greetings all, has anybody faced a similar situation? I was driving (open & clear rode) going about 10 under the speed limit, so I downshift & hit it for about .5-1seconds ( didn't exceed the limit). I look up and see blue light behind me; long story short no speeding, or any other traffic violations besides "improper lane usage", which I was ticketed for because of my exhaust. Cop asked if it was modified & I responded "I didn't touch it, got it straight from the dealership." He said I could fight it, but I was seeing how/is it worth fighting? I'm down south so hearing tickets for stock exhaust are uncommon