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nathaniel
Dodge Dakota
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8/02/2002
13:43:34
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 Subject: when to upgrade to headers??
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i believe that i read that the stock exhaust manifolds are good up to about 300 h.p. after that headers are needed. i can not find the post that stated this. is this true? also on the aftermarket Y pipes, what is the diameter of the single pipe. i would like to go with a full 3" exhaust from Y pipe back. will i have to get this custom fabricated?
thanks,
nathaniel
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CThomp
Dodge Dakota
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8/02/2002
15:35:01
| RE: when to upgrade to headers??
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engine size?
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nathaniel
Dodge Dakota
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8/02/2002
15:49:49
| RE: when to upgrade to headers??
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318 with mopar pcm, m-1, cat back, cold air, modded TB, relocated IAT.
thanks
nathaniel
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R/Truck
Dodge Dakota
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8/02/2002
15:52:41
| RE: when to upgrade to headers??
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Your ready for them! You will notice a nice gain in the mid-high level rpms with the headers. The factory Y pipe is just over 2". A lot of the header companies sell Y-pipes or you can have one made at your local muffler shop.
I got the PPH headers and they came with the Y-pipe. I also upgraded to 3" pipe and high flow cat.
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nathaniel
Dodge Dakota
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8/02/2002
16:25:47
| RE: when to upgrade to headers??
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when the two banks merge into one what is the diameter of the pipe. if it is 2.5" then a 3" system out from there does me little good. what do you all think.
thanks,
nathaniel
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kota on 20s
GenIII
8/03/2002
00:33:04
| RE: when to upgrade to headers??
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from personal experience, the 1.7 roller rockers will give you more power for the money.
the pipe is 2 1/2" where the two meet
Eric, 98 5.2 5speed, K&N gen II, 50mm TB, 2bbl M-1, 1.7RR's, JBA ciramic headers, carsound cat, dumped gibson, and a lot more
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R.L.Stuart
Dodge Dakota
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8/03/2002
09:53:01
| RE: when to upgrade to headers??
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You know everyone on this board said to stick with the stock manifolds on the 4.7 that they flow the same,I went with the JBA headers and picked up 7 RWHP and 2 1/2 MPG with the Dynomax exhaust,70mm Tb and cams.
Just keep your pipe size around 2 1/2 and you should be ok.
Go For IT!
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routesixtysixer
Dodge Dakota
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8/03/2002
10:34:42
| RE: when to upgrade to headers??
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Thought you might be interested... Summit sells the Edelbrock "tubular exhaust system" (headers) complete with y-pipe, all in 409 stainless steel, for $349.99. Their website says mild steel, but Edelbrock's website says 409 stainless. I e-mailed Summit and they responded that, yes, their website is incorrect and that they are 409 stainless. This is only for, I believe, 97-98 5.2 Auto 2-wd Daks. You might take a look at www.summitracing.com
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nathaniel
Dodge Dakota
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8/03/2002
11:03:52
| RE: when to upgrade to headers??
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Thanks for the Edelbrock info. do you all know if both banks dump into a 2.5" or 3" pipe. I would like to have a full length 3" single system. or do you think that 3" will kill my torque?? see previous post for my mods.
thanks,
nathaniel
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routesixtysixer
Dodge Dakota
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8/04/2002
17:53:55
| RE: when to upgrade to headers??
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You might check with Edelbrock; they have a contact e-mail on their website. I think the y-pipe outlet is 3-inches.... I am curious about how much hp this would be good for, so if you go this route, definitely post results!
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95dak
Dodge Dakota
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8/05/2002
03:48:47
| RE: when to upgrade to headers??
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I HAVE A 95 DAK V8 WITH MOPAR PCM 392 5SP WITH HEADERS CUT THE Y PIPE WHERE IT MERGED USED ONE ORIG CAT, ADDED A CAT AND RAN FULL DUELS OUT THE BACK WITH FLOWMASTERS. THE EXAUST RUNS DOWN THE RIGHT SIDE OF THE TRUCK AND THE OVAL MUFFLERS ARE INSTALLED SIDE BY SIDE VERTICALLY. PIPES GO OVER THE REAR AND EXIT UNDER THE BUMPER. I NOTICED A CONSIDERABLE DIFFERENCE IN HP. ALL PIPES ARE 2.5 IN. THIS TRUCK RIPS. THE SINGLE PIPE THERY IS OK FOR V6 BUT THE 318 AND 360 LIKE THE TRUE DUELS.
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