3" down pips for Shorty headers

Discussion in 'Inquiries' started by RoseBud68, Mar 22, 2023.

  1. RoseBud68

    RoseBud68 Well-Known Member

    Hi, Looking to redo my exhaust system. Bought the shorty header and looking to install 2.5" system with long case muffler for my '71 455 GS. Question is, can is use the 3" down pipe and use a reducer to connect the 2.5 system? Not looking to go 3" all the way back. If so, what would the correct reducer size? Trying to make the install as easy ( more me ) as possible. Thanks.
     
  2. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

  3. RoseBud68

    RoseBud68 Well-Known Member

  4. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    https://www.amazon.com/Exhaust-Reducer-Inch-I-D-2-1/dp/B07Y5MH66K

    No, read the description of the reducers. The down pipe end will have a 3" OUTSIDE diameter (O.D.), and will slip inside the reducer. The reducer is designed with a 3" INSIDE diameter (I.D.). The other end of the reducer has a 2 1/2" O.D. to mate with the rest of the 2 1/2" exhaust.

    Read up on the TA site,

    http://taperformance.com/proddetail.asp?prod=TA_2008C

    TA has reducers as well,

    http://taperformance.com/categories.asp?cat=270

    The TA shorty headers come with reducers?
     
    Last edited: Mar 23, 2023
    RoseBud68 likes this.
  5. RoseBud68

    RoseBud68 Well-Known Member

    Thank you.
     
  6. jamyers

    jamyers 2 gallons of fun

    If you can manage, it's better to keep the large diameter pipe until the muffler, then you can downsize coming out of the muffler. With a good muffler like the Walker DynoMax, the exhaust will think it's hit open air when it enters the muffler, then as the pulses mix, cool somewhat, and pass through the muffler, a 2.5 inch pipe won't be a restriction. As Per David Vizard - I built the 2NABOT exhaust that way (shorty headers, 3" pipe to the mufflers, then 2.5 inch over the axle and under the bumper), and it's as zero-restriction as a full length exhause can be.
     
  7. RoseBud68

    RoseBud68 Well-Known Member

    Thanks, Never thought about going that way. Plan on getting the piping form TA as there are no muffler shops here that can do mandrel bends.
    Hoping to do all the work myself and avoid any welding if possible. I was looking at the Walker but feel the maybe a bit to quite for me. Looking to go
    FlowMaster 50 series long case. I have the old 40 series that was done back in the late '80.
    Wonder if TA would split them up like you say???
     
  8. RoseBud68

    RoseBud68 Well-Known Member

    Yes Larry, I have read up on these items. My Post is about the Shorty 3" down pips....

    TA has Collectors reducers... Your first post is what i was looking for.

    I bought the shorty used, so the collectors where modified for the previous owners exhaust.
     
  9. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Very Good.
     
  10. RoseBud68

    RoseBud68 Well-Known Member

    Well, tried to order the TA 3" down pipe to connect to my shorty today and was told they are back order for the last 3 months. Does not sound good. I was placed on a list and will get a call when they come in.....Right.
     
  11. jr_

    jr_ Well-Known Member

    I called last week and was told they are still on back order…. :(
     
  12. TA Perf

    TA Perf Member

    If this is the TA2008C you guys are looking for I was unaware that we were out. I see there are 3 sets on back order with us. To be perfectly honest. They are not even on order. I apologize. I will get these on order this coming Monday. Very sorry.
     
  13. RoseBud68

    RoseBud68 Well-Known Member

    Well that just sad.....
     
  14. jr_

    jr_ Well-Known Member

    Thanks for the heads up. What do you suspect the wait time will be ?
     
  15. 1973gs

    1973gs Well-Known Member

    I tried to order some three weeks ago. Still on back order.
     
    breakinbuick11 likes this.
  16. RoseBud68

    RoseBud68 Well-Known Member

    On back order for over a year. Don't hold your breath.
     
    1973gs likes this.

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