to my knowledge there is no 4" turbo back system from a dealer you custom build a DP and then do whatever you want. i would aerotubine muffle it with custum 4" piping

 

1st gen aftermarket support sucks.

We're the ones that started it all, damnit. We're the classic hot rods of the Diesel world. There wasn't any Diesel engine worth tuning up before the first gen.

Then again, we're also all too cheap to buy what is available on the after market, so...

 

....yeah, pretty much. at this point I'm even too cheap to own a 2nd gen 12v.