00'mustangGT

i have a 2000 gt and i installed mac catback and a pro chamber and idk if its just me but the exhaust sounds muffled and has a weird whistling sound coming from it. idk if its spark plugs or any thing to do with fuel that affects this. i put a video link up so tell me what you think.

jwallz23

cant really tell, sounds fine

Gary Ugarek

Sounds fine to me.

Vertigo_GT

I heard whistling under the hood but not out the back.

00'mustangGT

idk it just sounded muffled to me. ik the spark plugs have to be changed ill see if that makes a little difference

fastbackford351

I heard what sounded like maybe an intake whistle under the hood but the exhaust sounded clean.