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Derv doctor do them. No advantages on a diesel though with them having no throttle body.

You can fit one just for the noise, but I would think it would play hell with your MAF data. May be wrong though.
 

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There's topics covering this, should search on the topic of dump valve and diesels.

But basically it's not good - it's bad it,s basically a leak in the system, tdi don't need a dump valve/bov like it's petrol counterparts. Fitting one in your case will definately mean a loss of performance/economy.

It also doesn't sound like a dump valve/bov fitted on petrol counter parts.

If you still want to fit one then, you can fit any dump valve/bov, I'll have my forge split-r for sale soon if you can wait a week.
 

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Normal BOV's may cause your turbo to stall . Decatting would release a few horses but a straight through exhaust would just make it sound appalling unless it was a really fancy pants system, you'd also have to get the system diameter correct to optimise performance.
 

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cut the cat out and you will get a slight flutter noise

take the back box off and if you can live with the noise under load you will love the flutter when you let off.
 

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Glad you changed your mind, a decat is definately a must on a derv or atleast I would recommend it, it's cheaper than buying a replacement cat, it frees up a few horses and gives more torque, plus best bit of it all is you won't have any problems with emissions when it comes to MOT [Y]
 

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Sorry for this stupid question but if you decat a gttdi130, it will pass mot, and will give the advantages listed on this thread?!
 

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i have a used derv doctor dump valve that was on my pd130... just the dump valve itself

2 slight wear marks, superficial only, brushed aluminium with derv doctor engraved on it

?50 to your door
 
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