On my girlfriends accord, she has a magnaflow catback with custom piping (think 2.25"). Only when it rains and there is little to no throttle applied, her exhaust rattles (very hard). I thought that it was hitting the axle, but she's stock height, and LOTS of room. I then thought that it was too stiff from no flex pipe causing weld fatigue. I then found out she still has the flex pipe. Any ideas?

 

All i did was make sure that the under side of the heat shield of the intermediate pipe & catalytic converter was removed. this tends to be the reason for the rattle.
Also make sure the pipeing is not hitting the exhaust hanggers on the bottom the the car.

 

I just had the same prob with my wifes accord took it to the same shop that put my exhaust on and they fixed the prob

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by smooth95 &raquo;</TD></TR><TR><TD CLASS="quote">I just had the same prob with my wifes accord took it to the same shop that put my exhaust on and they fixed the prob</TD></TR></TABLE>
any idea what was going on?

 

yeah it was the heat shield

 

HeatShield

 

The one around the cat allways goes bad