i just put a new flex downpipe on my 300d and seems that it is so close to the tranny that it will vibrate against it when i'm at a stop with my foot on the brake. it's very annoying, to the point of me putting the car in park so as not to hear it. i am pretty sure i put the pipe on correctly, but am going to take it to the muffler shop at the end of the street just to be sure. perhaps they can pry it away from the tranny...is your vibration a metal slapping sound such as i'd describe mine to be? or is it more like an engine shaking vibration situation?

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alimony