Bizarre creaking/groaning under hard acceleration 1,2,3

[samario1984]

2008.5 mazdaspeed 3 cobb exhaust, race pipe, short ram intake, accessport stage 1 are the modifications on the car. When i get on the throttle hard in mostly the first three gears i hear a rattling/groaning type of noise.. It sounds as though it is the racepipe hitting the floor board of the car. I looked and it is pretty close to the floor board. My thoughts are either loose, or bad motor mount, or my exhaust is in fact flexing due to motor movement and hitting the floorboard. The noise is driving me insane and makes me feel like I drive a P.O.S. Anyone else have this problem or know what it could be?

 

[MSMS3]

Check and consider replacing the rear motor mount. Need to do that anyway.

Check hangars and any rubber parts of them on your exhaust system.

Engine movement is causing the noise under hard acceleration.

 

[samario1984]

Thanks that is what I was thinking.

 

[tinboi479]

Definitely the RMM causing the exhaust movement.