I put one one my TE. I'm convinced it does help with engine noise up to a certain point when the wind and road noise takes over. I gotta convince myself, it cost about $170.
Warning: These are too big to ship reasonably. I ordered online but got a call saying they couldn't ship it. Ended up ordering online from my local dealer and only saved about $60 off list.
Not one of the 3 dealers in my area will price match. They won't even price match their own online price if you try to order in person. You must order online and select pickup. Go figure.