jdmbseries20

i have a dc sport header on my jdm gsr right now but there a lil tight against the oil pan. Also since them i have a tingy sound from the exhuast almost sounds the the resonator.....its not the header vibing of the oil pan cause i wrapped it with thermal wrap. So 1 whats the tingy noise?? (the tingy noise is not a vibration from anywhere on the exhaust it sounds internal) 2 should i just get itr header instead? thanks