Exhaust Adapters for 6 cyl stepdowns

bobdriveshudson2bobdriveshudson2 Expert Adviser
Now available(again) at Pigeon Forge, TN 26-30 Oct Thanks for your patience, Bob

Comments

  • bobdriveshudson2bobdriveshudson2 Expert Adviser
    Posts: 61
    Price for one exhaust adapter to bolt to the bottom of a stepdown 6 cylinder exhaust manifold is $200 plus shipping(USPO flat rate). We should have the 3/8" flanges to weld the exhaust pipes to, price later, can be shipped in same box. Sorry for any delay or confusion. Bob Parks
  • bobdriveshudson2bobdriveshudson2 Expert Adviser
    Posts: 61
    8 loaded ready to lv for PF. Thanks for the orders.
  • SuperDaveSuperDave Senior Contributor
    Posts: 3,290
    Got mine from Bob. Already did trial fit to a Twin H exhaust manifold. Will post pictures later today. Now I need the matching intake.

    Live in the past.... it's cheaper.

    49 Super six Brougham

    49 Commodore Eight Convertible

    Melbourne, Florida

  • SuperDaveSuperDave Senior Contributor
    Posts: 3,290
    I had to replace one stud with a bolt due to the lack of room to start a nut on the stud with the adapter in place. just drilled the threads out of the original manifold and dropped a bolt in.  I also made a stainless shield to keep the exhaust out of the intake. I also removed the heat riser flapper and filled the holes with a couple short bolts. Adapter flange is at the welding shop. I decided to let the pro do the welding. I am going to use 1 7/8 exhaust pipe. It's only a 262 so I don't think dropping 1/8 ' is going to make any significant difference. I am going for the "sound" not performance. Maybe snakeing 1 7/8 pipe through the cross members will be a little easier than 2". Any suggestions on muffler choices? It's a '49 so has more room next to the fuel tank than the 51 and newer.
    exh flange bolt 2.JPG
    1600 x 1200 - 403K
    exh.flange bolt1.JPG
    1600 x 1200 - 426K
    blocker plate .JPG
    1600 x 1200 - 408K

    Live in the past.... it's cheaper.

    49 Super six Brougham

    49 Commodore Eight Convertible

    Melbourne, Florida

  • bobdriveshudson2bobdriveshudson2 Expert Adviser
    Posts: 61
    We put two new stainless mufflers welded together beside the gas tank, both exhaust pipes exit together under the bumper. We used 2" pipes front to rear. Thanks for the order.
  • Ol racerOl racer Senior Contributor
    edited November 2016 Posts: 2,301
    Ive seen Hudson Step-down's using a muffler with dual inlet & outlets which I thought was neat but dont know the the part number.

  • bobdriveshudson2bobdriveshudson2 Expert Adviser
    Posts: 61
    Thanks for the questions, first order from CANADA. Price change on Felpro gasket material: w/o holes to match the flange $5,  with holes to match $13.  Thanks, Bob
  • bobdriveshudson2bobdriveshudson2 Expert Adviser
    Posts: 61
    Bump, thanks

  • dougsondougson Senior Contributor
    Posts: 672
    We put two new stainless mufflers welded together beside the gas tank, both exhaust pipes exit together under the bumper. We used 2" pipes front to rear. Thanks for the order.

    Posted this a while back. I used a Walker Dynomax.
    httpforumhetcluborguploadsFileUpload2167c9aab3df7190255f03fc379c0ee2jpg
    Doug Smith - "Toby Knoll Garage"

    1951 Muntz Jet
    1953 Woodill Wildfire/Dodge
    1954 Hudson Hornet coupe/Grand National Tribute car
    1955 Studebaker Speedster/Cadillac - "Studillac"
    1956 Corvette SR Replica


  • dougsondougson Senior Contributor
    Posts: 672
    We put two new stainless mufflers welded together beside the gas tank, both exhaust pipes exit together under the bumper. We used 2" pipes front to rear. Thanks for the order.
    Oops. Meant this post
    Doug Smith - "Toby Knoll Garage"

    1951 Muntz Jet
    1953 Woodill Wildfire/Dodge
    1954 Hudson Hornet coupe/Grand National Tribute car
    1955 Studebaker Speedster/Cadillac - "Studillac"
    1956 Corvette SR Replica


  • dougsondougson Senior Contributor
    Posts: 672
    Ol racer said:
    Ive seen Hudson Step-down's using a muffler with dual inlet & outlets which I thought was neat but dont know the the part number.


    I'll try again!
    Doug Smith - "Toby Knoll Garage"

    1951 Muntz Jet
    1953 Woodill Wildfire/Dodge
    1954 Hudson Hornet coupe/Grand National Tribute car
    1955 Studebaker Speedster/Cadillac - "Studillac"
    1956 Corvette SR Replica


  • Ol racerOl racer Senior Contributor
    Posts: 2,301
    FYI
    Dual inlet & outlet Muffler is Thrush / Dynomax #17637. It has 2 1/4" in/out so a bushing is required. Cost around $40
  • Ken U-TxKen U-Tx Senior Contributor
    Posts: 3,235
    We used a Magnaflow  dual inlet & outlet . Yes bushings used.
    DSC04028.JPG
    3264 x 2448 - 2M
    DSC04029.JPG
    3264 x 2448 - 2M
  • keithfullmeryahoocomkeithfullmeryahoocom Expert Adviser
    Posts: 272
    Nice job, Ken

  • bobdriveshudson2bobdriveshudson2 Expert Adviser
    Posts: 61
    Bump, thanks
  • bobdriveshudson2bobdriveshudson2 Expert Adviser
    Posts: 61
    We have some adapters ready for sale now  and will bring some to the Pigeon Forge meet in October. Thanks
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