Hello I have a skoda octavia mk 2 and these pipes which I think are the intercooler pipes are leaking at the seals can I replace the seals or do I need to change the full pipe. Does anyone know what the part might be called or a number 

Pull the silver clip out part way and wiggle/pull the pipe free.

 

You can then assess the o-ring, it's common for the lower pipes to weep oil.

 

Measure the o-ring if required and shop around for the best price, it's nothing special so no need to pay for OE VAG item.

 

You may find the o-ring undamaged and cleaning it and the female receptacle fixes your problem.

 

To refit, push the pipe back in until you hear the silver clip click.

Thanks micmac that's great