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Old 12-16-2009, 03:26 PM
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street legal headers??

Are there any street legal headers that connect to the factory exhaust? Found out today that the MP headers are not street legal dammit....

-Daty
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Old 12-16-2009, 04:09 PM
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The only street legal header I am aware of are the shorty headers that hook up to cats. Any header that removes the cats are illegal (all long tube headers I am aware of are illegal) Many of our vendors sell them both. The SRT8 shorty headers are also available through members who have removed them. Look for them on the for sale section of this forum.
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Old 12-16-2009, 04:27 PM
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Do you know the legality of them if they include high flow cats hemiorange? I know they may not be carb approved and all that but I'm sure there are a few long tubes out there that are ok for street use.
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Old 12-16-2009, 05:35 PM
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Originally Posted by Daty Rogers View Post
Are there any street legal headers that connect to the factory exhaust? Found out today that the MP headers are not street legal dammit....

-Daty
The short of it, you cannot touch the cats. The only headers that will work with the stock cats are shorties. Long tubes are better, high flow cats are better yet, no cats even better yet. For street legal, keep stock cats, add shorties.

JBA makes a good set thats street legal.

Now one thing to know. The stock exhaust manafolds are so restrstrictive, that when you add headers, even shorties it will lean out and possibly dammage the engine, so you must have a preditor to add fuel, or get a custome tune that adds exactly the right amount of fuel. You can use a wideband O2 to monitor it as well.
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Old 12-16-2009, 05:37 PM
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Hears the think, add headers, cat back, DiabloSport 93 octane tune + whats needed to make the headers the proper tune, and now your right at SRT-8 power. So shorties arent that bad.
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Old 12-17-2009, 07:58 AM
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American Racing Headers 2006-09 Challenger, Charger, Magnum 300C 5.7 HEMI American Racing Headers Stainless Long-Tube with Cats
Kooks Custom Exhaust Headers for the 2008 Dodge Challenger R/T - shopHEMI.com

I've found these so far, probably go with the American Racing headers, does anyone have any experience with these or Kooks? A Predator is on order along with their catch can so that is taken care of too. My B5 SS is at the dealer getting the stage 2 suspension put on (damn I miss my Fast Sofa!). Can't believe they put on such restrictive manifolds on these cars, oh well...

-Daty
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Old 12-17-2009, 08:31 AM
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When I had my Jeep SRT8 there were several who installed headers only to have constant "Check Engine" light problems. Many removed the headers and some managed to find a way to work around this problem. I believe it took several years to figure this all out. You may want to check the Jeep forum because it's the same engine. Builder Bill on that Forum seems to have a lot of experience with this.
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Old 12-17-2009, 10:21 AM
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long tubes no good but shorties are ok
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Old 12-17-2009, 12:16 PM
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I've had the JBA Shorties on my 5.7 Magnum for nearly two years along with the high flow cats and not one single code.
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Old 12-17-2009, 03:46 PM
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x2 on what Bonez said.

Jack
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