Had a garage look at how I could improve the sound from my exhaust, got quoted £450 for a powerflow setup which I'm considering. Anyway, on inspection he said a gasket either before or after a cat (can't remember which) had completely gone and I needed to get it sorted. Now I'm not mechanically minded enough to try and find what I need, and he really didn't explain it very well even after trying to get my head around what he was saying. Any help or links would be appreciated. The exhaust I currently have is aftermarket but not sure what brand etc. I've uploaded a picture of what he said the gasket should look like. It's a V6 Sport X reg. Cheers.

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