forddieseldoctor Posted February 21, 2017 Share Posted February 21, 2017 I got an 03 with 400k on it with a cracked off downpipe. The 03 downpipe is obsolete. Has anyone put an 04 downpipe in an 03? I know it will whistle more without the resonator in the pipe and the foil wrapping. It's a fleet truck for a concrete company. The customer has already said they don't care about the noise level. Quote Link to comment Share on other sites More sharing options...
lmorris Posted February 21, 2017 Share Posted February 21, 2017 It should work. Aftermarket down pipes fit all MY 6L pick-ups. No reason why the factory one won't. Quote Link to comment Share on other sites More sharing options...
forddieseldoctor Posted February 28, 2017 Author Share Posted February 28, 2017 It fits, but holy crap does the lack of foil and resonator make a big difference. That 03 turbo really is way noisier. Quote Link to comment Share on other sites More sharing options...
Matt Saunoras Posted February 28, 2017 Share Posted February 28, 2017 Yeah it's pretty outrageous. That combination of the 10 blade turbine and the skinny vains is really unmatched. Quote Link to comment Share on other sites More sharing options...
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