nasty exhaust rattle

[ludaprix]

hiya guys, my 172 develops a really nasty rattle when i have 2-3 passengers in the back, its definatly the exhuast rattling sumwhere, but i cant see where!

like i said it only occurs when i have a load and when im driving really really slowly and at idle. any suggestions?

oh an the car is lowered on coils if that makes any difference

 

[lemonnobby]

rear box touching the axle at the back, baffles in the box?

 

[ludaprix]

its coming from the front of the car around the front pipe (decat) to be honest.

 

[lemonnobby]

manifold touching subframe/heatshield

 

[ludaprix]

ahh i suppose it could be touching the subframe at a guess but why would it only do this when i have passengers in the back?