Hi where can I buy silicone hoses from - I'm after the one circled in the attached image.
Roughly how much do these cost?

Cheers.

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Top radiator hose
If you're getting that, get the bottom radiator hose as well
You usually purchase this as a set, around $300 from memory.

How hard is it to change, is a DIY job possible for someone with limited knowledge?

By top, you do mean the big one (not the 2 little ones above it, right?)

Where would i go about buying this?

Cheers.

No, those little ones also come with the Samco radiator hose kit

Its as easy as changing out a radiator. I had mine changed with the radiator change, so can't comment.

Ebay, or any of the performance stores can source them

peice of cake to fit, just make sure you use new hose-clamps at the same time.

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Long live the WRC

AVO complete hose kits for the WRX.....

Cheers for the help guys