Down Pipes - Diesel Truck Forum -
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post #1 of 6 (permalink) Old 01-16-2007, 04:45 PM Thread Starter
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Down Pipes

Just a quick question for the experts...

Are all down pipes for the OBS created equal? I know that some may have a little easier install but I've noticed quite a price difference amongst them when doing a little checking. I just don't want to get burned trying to save a few bucks?

Thanks in advance,

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post #2 of 6 (permalink) Old 01-16-2007, 04:59 PM
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Nope, most of the differance is Aluminized to SS pipe and brand names...

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post #3 of 6 (permalink) Old 01-16-2007, 05:06 PM Thread Starter
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Thanks a bunch, I'm thinking of ordering this one. So I shouldn't be scared about aluminum or stainless etc?
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post #4 of 6 (permalink) Old 01-16-2007, 05:08 PM
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Some have different ends where it meets up to the rest of the exhaust. Hypermax has a 3.5" lower section and just a slip joint at the bottom so you have to cut the flang off the cat to install it. But it makes for a nicer install if going to a full 4" system. They are also one of the cheapest. Most all of the rest of them have the flange that bolts to the cat. Some have a bung welded in them for a pyro probe. Don't buy one based on that. You don't want the probe there anyway. You want it in the exhaust manifold.

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post #5 of 6 (permalink) Old 01-16-2007, 06:14 PM
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Choose your downpipe according to the final outcome of the exhaust system. What I mean is, if you're eventually going to install a whole system (home-made or a kit) just buy it now. When I installed my down pipe I chose one that bolted up to the cat, b/c I wanted to keep a stock system or eventually upgrade to a 4" system later on. A few years pass and I decide to go ahead and upgrade to 4". What I found is that no body makes a "cat-back" system for our OBS trucks. And all the systems I fond were turbo-back.... meaning that a down pipe was included. I ended up installing a 4" home made set-up after the cat & it was a complete PITA! If I were to to it again, I'm deffinately going w/ a kit that will bolt up.

Just my .02. Take it for what it's worth.
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post #6 of 6 (permalink) Old 01-17-2007, 06:31 PM
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Magnaflow's kit is cat-back.

If you want the entire kit you have to ask for the downpipe as well. But if you just get the 4" SS exhaust for 94-97 PSD, it is cat back, and considerably cheaper than other comparable turbo-back kits.
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