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Title: Hardbody exhaust system and smog questions Post by: Keithwidney on November 20, 2011, 01:51:28 PM Well I took my truck to get smoged and it failed . I have a high co reading . So now I need to replace the catalytic converter and since I will be doing that I'm thinking about doing a whole system and wanted to know if there would be any benefit to it , power gains . What sounds good , not too loud ( I leave for work at 4 am , don't want neighbors to hate me) .or any other info.
Title: Re: Hardbody exhaust system and smog questions Post by: SteeevO on November 21, 2011, 05:59:34 PM Keith,
I'm working on getting more Doug Thorley headers made for the 3.0, with headers and having the exhaust reran with 2.5" pipe you will see gains. for a muffler I recommend getting something with packing in it to keep the drone down but will still flow well. Title: Re: Hardbody exhaust system and smog questions Post by: Keithwidney on November 21, 2011, 09:10:22 PM What is the stock pipe size?
Title: Re: Hardbody exhaust system and smog questions Post by: SteeevO on November 21, 2011, 10:34:17 PM 2.25" i think . I don't remember 100%
Title: Re: Hardbody exhaust system and smog questions Post by: KovemaN on November 22, 2011, 10:10:32 AM I love the sound of the Flowmaster Delta 50 with the Thorley headers. It may drone a little on the highway, but the sound is nice and deep without being raspy. My exhaust guy charges me $100 for new custom exhaust from the cat back. If you get a universal cat it might cost a little more to have everything connected. I highly recommend having flanges installed so the system can be removed if needed.
Title: Re: Hardbody exhaust system and smog questions Post by: Keithwidney on November 22, 2011, 10:30:07 AM Where is your guy located . I got a quote yesterday for 400 cat muffler and turn out . A little high price IMO .
Title: Re: Hardbody exhaust system and smog questions Post by: KovemaN on November 23, 2011, 11:37:10 AM I'm in Phoenix. Sorry if I misled you, but that price was just for the tubing and work to install a muffler that I provided. I would expect to add another $100-125 for the muffler and $100 for a new cat if purchased from an exhaust shop. I kept an eye out for a while and picked up a direct fit Magnaflow cat for $75 and the Flowmaster Delta 50 for $60. My total price was less than $250 installed.
Title: Re: Hardbody exhaust system and smog questions Post by: Keithwidney on November 23, 2011, 02:46:33 PM I found a weld in cat from magnaflow and my muffler is fairly new and sounds ok . So I'm going to go with the new cat , new piping and old muffler . And a set of the Doug thorley headers when I can afford them
Title: Re: Hardbody exhaust system and smog questions Post by: Keithwidney on November 28, 2011, 08:40:24 PM Well I got it to pass without putting a new cat in . I put a new oxygen sensor and cleaned the mass air flow sensor .
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