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got drilled and grooved on mine, sounds like a bike when slowing down, get a whirring kinda noise slowing down.
ads 15hp looking cool ;)
genuine are supposedly better though

not helpful, but I made my own! about £150 in materials, just need to do the (rather over the top) 3" downpipe when I can afford a new turbo.
If you want to be cheap and have the ability to, I see...

would have thought the stock manifold would give a fairly imbalanced flow, it would be interesting to compare across there.
Might be a consideration if the target was seriously high hp
Modifying...

Installed the standard Volvo strut brace on my MK1 V70 TDi today.
becuase it didn't sound that hard.
The issues are the bracket holding the main fuse box on the right hand top mount, and the fuel...