Rep Power: 0

I put the HP header and hi flow cat on this past weekend and noew there is a whistling sound coming from somewhere. I am pretty sure it is where the header and cat bolt up together. I put a new gasket from honda in there but it is still making the noise. The problem is that the header and cat don't meet up perfectly parallel and there is a larger gap between where they meet on the top than there is on the bottom. Can anypne give me some suggestions on what I should do to fix this? Thanks

 
Rep Power: 0

you can try a gasket sealer. if the pipes aren't lined up together, there's probably air seeping through. but that's my suggestion. i could be wrong though.

 
Rep Power: 0

You have an exhaust leak. I have the same problem after messing with my exhaust. Re-do the connection where you think the leak is at.