Hi,
Just drove from Leicester to Brighton today and when i got into Brighton and slowed down I noticed my engine was a lot deeper and raspier. Sounded fine when I left but had my music up loud don't know for sure when it changed. I hit a few large puddles on the motorway (60-75 mph) just before Brighton so that may have damaged something.
The noise sounds a bit more like a rally car and is there when i accelerate but is more noticeable when i let off the revs and let the car idle. It sort of sounds like sticking a playing card in the spokes of a bike.
If i walk round the car and open the engine bay, its hardly noticeable in the bay but gets 'bassier' the further ~I get towards to the back of the car. I'm hoping its just a hole somewhere in the exhaust.
Car drives fine (although don't want to drive it until I know what the issue is). and no warning lights are on oil is registering 30 psi when idling and 60 + under revs.
I took 2 videos the sound isn't great though.
Accelerating then idling.
http://vid1310.photo...zps4dirwqjg.mp4
At a stand still and walking round car.
http://vid1310.photo...zpsyhsnq4nv.mp4
*****Edit*****
New videos
I cant see or feel any air being blown out, the sound is loudest at the back of the engine before the cats, but not sure if that could just be some sort of reverb effect. It gets deeper towards the rear of the car.
http://vid1310.photo...zpsdz43wp6k.mp4
I checked the intake and can't see anything wrong, it is loose though as the bolt securing it to the plenum is missing.