DC copy SS header impressions

[racerwannabe]

I just installed the topspeed header but there is a slight ringing sound when the engine is rev'd rather than a hiss...not 100% sure. Could this be due to a leak somewhere?

[aaronng]

I just installed the topspeed header but there is a slight ringing sound when the engine is rev'd rather than a hiss...not 100% sure. Could this be due to a leak somewhere?

Do you smell exhaust fumes in the engine bay or where the windscreen plastic cowl is? If you do, check if you used liquid gasket. You should use high temperature liquid gasket where the gasket meets the flanges of the topspeed header because it might not be 100% flat. The cat flange and engine head side don't need liquid gasket because they are very flat.

If there is no exhaust fume smell, then it is the sound of the flex pipe.

[racerwannabe]

Do you smell exhaust fumes in the engine bay or where the windscreen plastic cowl is? If you do, check if you used liquid gasket. You should use high temperature liquid gasket where the gasket meets the flanges of the topspeed header because it might not be 100% flat. The cat flange and engine head side don't need liquid gasket because they are very flat.

If there is no exhaust fume smell, then it is the sound of the flex pipe.

Thanks Aaron! I will go and check it out now. Another question, if you use the liquid gasket do you still need the gaskets supplied with the headers? Is it better to use both?

[aaronng]

Thanks Aaron! I will go and check it out now. Another question, if you use the liquid gasket do you still need the gaskets supplied with the headers? Is it better to use both?

Yes, you put a line of liquid gasket around the exhaust hole shape on the supplied gasket and then put it on the header. It might be a good idea to use liquid gasket on the cat side of the supplied gasket as well, but you don't really need it on the engine head side.

It will reduce the sound of the ringing if there was a leak, but it won't eliminate it because the Topspeed header's accordion flexpipe design has an inherent ringing sound.