I currently have an aftermarket downpipe on the car and last week when I put it back on the car I now notice I have a leak. I have tightened the screw and took it off and still seem to have a little leak any ideas on how to fully get rid of it?

 

Either you need to replace the downpipe gasket at the top or the gasket at the bottom for the clamp isn't properly seated on the downpipe.

 

well it was leaking on the top but I just got a new seal from you guys and it fits great! The only problem is the at the bottom.

 

Chances are the gasket at the clamp isn't fitted properly, it can be tricky to get all the tabs to clip onto the downpipe and it not move around on you if you're reusing the old clamp sometimes.

 

I find it best to replace both gaskets every time. It's not worth the hassle to redo it for $12.