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post #1 of (permalink) Old 09-23-2003, 09:12 PM Thread Starter
 
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what do you think about this?

I am going to be redoing my exhaust soon and was wondering if any of you guys and girls could give me some ideas or advice on them. What I am looking to do is have a y-pipe going into a high flow cat (3" probably) and then split out again into 2 2 1/4" 40 or 50 series(suggestions on this welcome) DF mufflers and then exit the exhaust under the bed and after the rear axle. In theory, wouldn't this work somewhat like an x-pipe? I already have some Afterburner headers installed on the truck and I am just looking to upgrade the rest of the exhaust. Any suggestions? It is for a 1988 K-1500 with a 350.
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post #2 of (permalink) Old 09-23-2003, 11:01 PM
 
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Re: what do you think about this?

How many cats do you have? If you have two, why would you want to do a y-pipe. This restricts flow and is not as good as having a complete catback system. Meaning, have (2) 40 or 50 series DF flows that exit out the rear or sides. Now if you only have one cat, well simply do what you want, cause I have two.
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post #3 of (permalink) Old 09-23-2003, 11:51 PM
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Re: what do you think about this?

you've gotta have a Y pipe coming from the manifolds into the cat. if you wanted separate pipes off the manifolds, he'd have to buy two cats and two mufflers.

anyway, yeah, upgrade your Y pipe. that should help the truck breathe...high flowcat is good...as for the dual mufflers, i've never been a fan. you can do a single in/dual out muffler - keeping the out pipes at 2.25-2.5". or you can go for a straight 3" all the way. thats a good setup for the 350.
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post #4 of (permalink) Old 09-25-2003, 02:30 PM Thread Starter
 
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Re: what do you think about this?

Why is it that you aren't a fan of dual mufflers?
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post #5 of (permalink) Old 09-25-2003, 05:58 PM
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Re: what do you think about this?

i don't see buying two mufflers when one will do the job just as well, if not better.
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post #6 of (permalink) Old 09-25-2003, 06:47 PM
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Re: what do you think about this?

I'd go with a single exhaust too. Just make sure its 2.5" or 3" all the way. If you get a good muffler and a high-flow cat, a single will perform as good if not better than dual.
Plus, its less pipes to be hanging all over the place.
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post #7 of (permalink) Old 09-25-2003, 10:16 PM Thread Starter
 
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Re: what do you think about this?

Ah, I would agree with the amount of pipe thing, and I suppose in the long run, single pipe may be better in the long run. Thanks for the suggestions. Do the 40DF, 50DF, and 70 series flow any different from each other, or is it just sound? I may even look into a Magnaflow or perhaps a Dynomax race muffler. From what I hear, the Dynomax's packing burns out after so long, so that is why I would choose the race mufflers. Maybe just go with the 2 1/2" in that case. Once again, thanks for the suggestions. I should be going in to talk to talk to my exhaust guy soon to get a quote. When I asked him about the piping for the y-pipe and two mufflers back, he quoted me around $100 if I supplied the mufflers, so that isn't too bad of a deal, I think anyway. As for the cat, I will probably just go with a Super Converter, unless you have any suggestion on that, too.

Now that I think of it, what about a 30 series? I have been to the flowmaster site before and if I recall, the 30 series was pretty good sounding, but it also probably wasn't the same setup as I would be running.
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post #8 of (permalink) Old 09-26-2003, 01:23 AM
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Re: what do you think about this?

get the Flowmaster 40 Series Original Flows.....i like it much better than my old DF 40
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post #9 of (permalink) Old 09-26-2003, 09:41 AM
 
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Re: what do you think about this?

I have a 70 series, nice and quiet...

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post #10 of (permalink) Old 09-27-2003, 09:54 AM Thread Starter
 
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Re: what do you think about this?

Well, I don't know if I am to the quiet exhaust stage in my life yet. Still a college student, so, throaty, deep, legal, and performance addition are what I look for right now.
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