down pipe - Diesel Bombers



1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

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Old 09-23-2011, 12:52 PM
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Default down pipe

hey guys im looking for a 4 inch down pipe for my 91 auto i/c im not having much luck any ideas?
-Tanner
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Old 09-23-2011, 03:03 PM
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I made mine out of two 4 inch 90*s
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Old 09-23-2011, 03:53 PM
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how hard was that just the 2 90*s and a piece of straight 4" and how do you connect it to the hc1?
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Old 09-23-2011, 05:34 PM
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I 2nd gen one will fit with minor "tweaking" of the firewall... And by "tweaking" I mean hitting it with a hammer....

If you are still running the H1C I would not waste my time or money on a 4" DP. The aftermarket bolt on 3-3.5" pipes are more then enough.
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Old 09-23-2011, 11:40 PM
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Whats up Tbone! Aint been on here for a few. And i agree with not needing a 4 in if you got a stock turbo.
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Old 09-24-2011, 10:16 PM
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I just welded it to the factory flange.

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Old 09-25-2011, 10:32 PM
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Check out Diamond Eye, they have turbo back 4in kits.
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Old 09-26-2011, 10:58 PM
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Old 09-28-2011, 03:15 PM
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I have a 4 incher on my truck that will be for sale soon. How quick do you need it?Rocky
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Old 09-28-2011, 10:09 PM
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source wants 200. for the down pipe you can get a whole system for not much more TV Diesel - Exhaust Systems and Components ken
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