Join Date: Jul 2009
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Are there any street legal headers that connect to the factory exhaust? Found out today that the MP headers are not street legal dammit....
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.
07 3.5L Charger K&N CAI, Magnaflow Cat back, JBA shorty's, DS 93 tune, sold, 2010 Challenger R/T 5 speed. 180 degree Thermostat, fan settings lowered, CC, ceramic brake pads, slotted rotors, red and black caliper paint, Challenger label for calipers, Corsa Cat back, functional hood ducts, and hood struts, 93 DiabloSport tune, Mopar drop in filter, JBA Shorties, Wideband O2, custome tweaked tune, Anti-sway bars front and rear, end links, strut brace, 12" subwoofer with amp.