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Stock 544 Exhaust + Dual Port Manifold from 123GT: Front Header Pipe Options 444-544

I just purchased a dual-outlet exhaust manifold from a 123GT and want to put it on my stock '63 544 Sport with a B18D. The exhaust is stock.

Is there an OEM Volvo front header pipe that would fit the geometry of the 544 and the dual-outlet manifold?








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    More confused now than before 444-544

    So in general, it sounds like this:

    Yes, the later 4-2 exhaust manifold fits my PV as it does to all 60s Volvos. The header pipe on the original exhaust is obviously of a small size and won't fit. The rest of the original PV exhaust is also undersized.

    There's no Volvo header pipe that is a direct fit with my original exhaust. I could either get a custom header pipe made or get a whole new exhaust system.

    Is this the correct view? Thanks to all who responded.








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      More confused now than before 444-544

      I think that's it. Yep.

      Cameron
      Rose City








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        More confused now than before 444-544

        Michael Basel is correct that there was a dual inlet lead(as in leader) pipe made for the later P210.

        It is no longer available from Volvo, but a 2 piece reproduction is available.

        And if the rest of your exhaust is stock, the P210 dual inlet lead pipe directly replaces the single lead and connects to the stock single lead front muffler and that is the way Volvo designed it. So in the stock trim, you still wind up flowing through the same sized mufflers and tailpipe. Volvo did the same thing to the 122 in that they added a dual inlet lead pipe, but retained the exact same sized muffler and tailpipe.

        I was actually surprised to discover the P210 dual inlet lead pipe existed as I was sure that the P210 NEVER came with a dual inlet lead pipe, but upon checking the parts manual, there it was. My only excuse is I don't think I have every seen a 1967-1969 P210 as they might not have been commonly imported to the US.

        In the past, whenever we used a dual outlet exhaust manifold on any PV usually with a B20 upgrade, we would use the dual inlet lead pipe from an 1800E/1800ES which is short like the B18 544. The 1800E/1800ES lead pipe has a 2" outlet, which is larger than than stock 122 or P210 dual inlet lead pipe.

        We would then take the car to a local exhaust shop and let them cobble together a larger exhaust system which usually costs an additional $250.00 on top of the 1800E/1800ES lead pipe.


        --
        Eric
        Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
        Torrance, CA 90502
        hiperformanceautoservice.com or oldvolvosonly.com








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          More confused now than before 444-544

          All B18B & B20B 140 Cars have 2" OD exhausts, B20E have 2.125", so I would be surprised if the P1800S & ES did not have the same size. For mild engines the B20E exhaust is pretty good, but the mufflers must be of original quality: straight through with clean holes not protruding in to the gas flow like a cheap hotdog. Original mufflers have a mandrel bend internally.

          --
          69 142S Overdrive + 69 164S Manual








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          More confused now than before 444-544

          This must be it:

          http://www.cvi-automotive.se/en/articles/2.14264.54317/exhaust-downpipe-duett-67-this-can-be-shipped








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    Stock 544 Exhaust + Dual Port Manifold from 123GT: Front Header Pipe Options 444-544

    The 122/1800 headpipe should fit but may not mate up to the rest of the exhaust without some futzing. We use this setup in each of our PVs.

    Cameron
    Rose City








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      Stock 544 Exhaust + Dual Port Manifold =: Flows like a Header. 444-544

      This upgrade to dual pipe manifold & head pipes is reputed to flow ALMOST as well as the expensive Header IPD used to sell, with the aluminum intake + SU's. Read that here years back in a Header VS. manifold discussion.
      Something different, I found a muffler shop willing to improvise and we
      did the full dual exhaust on my 122 Wagon with 2-18" glass-packs and 2- Anza twin chrome tip resonators from a Bug-eye sprite at the rear bumper. Sweet tunes!!
      Regards, Ken in Florida








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        Stock 544 Exhaust + Dual Port Manifold =: Flows like a Header. 444-544

        Did you use a 122S or other later Volvo headpipe or was that custom?








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          Stock 544 Exhaust + Dual Port Manifold =: Flows like a Header. 444-544

          The problem pipe is the one from the manifold to the first muffler. The difference between the Amazon side chassis members and the PV "horns" means that neither will work on the other. Actually the PV one might work on the Amazon but it would then be out of line with the front muffler. A good muffler shop should be able to bend you up a pipe that suits the PV but you will almost certainly want the rest of the system made up to match the bore size due to the original PV system being a smaller bore. Anyone trying to fit a 4 branch Amazon manifold quickly finds the "horn" that side gets in the way. Finding someone that makes a good set that fits and works is better than a cut and shut job on an Amazon set.








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            Stock 544 Exhaust + Dual Port Manifold =: Flows like a Header. 444-544

            I don't quite follow- where is the interference?

            Thanks,

            Cameron








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              Stock 544 Exhaust + Dual Port Manifold =: Flows like a Header. 444-544

              Cameron. I know you have your PV and that you work on both types of cars so if you say there isn't an interference problem I bow to your experience. I deliberately didn't jump into this thread when it started because I only had hand me down knowledge. MANY years ago here in the UK, Janspeed (http://janspeed.com/) made a batch of 4 branch systems for the PV because the Amazon ones wouldn't fit. The forward facing chassis horn was noted as the reason that for the need to modify the exit pipe from the system. I based my comments around that and I'd be pleased to have your opinion. This knowledge filed away in my brainbox in the late '60s when I had my first Amazon, 1961 B16B, so there might be a bit of brain fade








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                Stock 544 Exhaust + Dual Port Manifold =: Flows like a Header. 444-544

                I believe that the manifolds and headpipes are interchangeable between models but I have no idea whether or not a 2 into 1 headpipe will align with the original exhaust on a PV that previously had a single downpipe. So I wasn't sure if that was the interference you were referencing. Years ago I put a dual downpipe on a 122 and managed to mate it up to the car's existing exhaust, but I don't know if that was original or not.

                I've found fitment issues with headers just about every time. The old OLD ipd header, which was actually a tuned piece, contacted the upper a-arm on 122 and 1800 models (I don't know how it fits or doesn't on a PV). The prior version of the ipd header that was similar to what they have now contacted the oil pan flange. And the Swedish built (but I don't know who made it) 4 into 2 into 1 piece that VPD used to offer hit both the upper a-arm and the floor of the 122. Grinding the a-arm helped that part, and changing the bend in the bottom end of the header itself helped the other part.

                Thanks,

                Cameron
                Rose City








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                  Stock 544 Exhaust + Dual Port Manifold =: Flows like a Header. 444-544

                  Checking both the PV and Amazon parts books is enlightening even if it doesn't prove the interference, if any. The PV, as standard only has a very short front pipe which goes to a muffler under the passenger seat. The Amazon has a long one which goes to a muffler just in front of the back axle. The Duett has a long front pipe which looks very much like the Amazon one but it does have a different part number. The very last Duetts, they carried on for another 2 years or so after the PV544 finished, last chassis number 440,000, which is cool, finished up using the combined twin out manifold which used the single Stromberg. It looks as if there is a part number for this pipe but there is no illustration. Curiously, although the Stromberg is catalogued there is no illustration of the matching manifold. There does appear to be a part number.








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      Stock 544 Exhaust + Dual Port Manifold from 123GT: Front Header Pipe Options 444-544

      Thanks for the info. What did you have to do to make it work?








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        Stock 544 Exhaust + Dual Port Manifold from 123GT: Front Header Pipe Options 444-544

        The manifold bolts up to the engine as normal, and the headpipe connects to the manifold as normal. The original exhaust, though, didn't match up directly to the new headpipe. Rather than deal with adapters, we had a new exhaust made for each car.

        Cameron
        swedishrelics.com








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    Stock 544 Exhaust + Dual Port Manifold from 123GT: Front Header Pipe Options 444-544

    The last Duett 210 had a double port outlet, maybe you can find something suitable there?
    Regards Michael







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