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  1. #26
    FEP Power Member
    Join Date
    Nov 2007
    San Mateo, CA


    Quote Originally Posted by gr79 View Post
    The timeline of internet and pc really changed business, for the good and not.
    Ford may have blueprints for all their exhaust systems on file. Old ones too.
    Nowadays suppliers offer even more cataloged parts for OEM. Off the shelf products. Sensors, tires, light bulbs.
    Auto co's own the tooling and prints if they design the entire parts or respeced aftermarket. Supplier gets contract to build.

    Helps to research where the parts came from and what happened to the suppliers so as to find new sources of parts.
    When visiting DAP in the 70's, 80's, 90's, noted vendor bin tags. Arvin (AP?) and Walker as 2 exhaust component vendors.
    Having worked in the Detroit area auto industry parts chain a long time, knew parts could be easy or impossible to replace someday.
    Swap meets, car shows, parts counters, internet sources, give clues. Aftermarket needs a fairly large demand for production batch runs.

    Arvin/Maremont. Timeline includes buyouts, holding companies, capital.
    Maremont is now

    Did not know this one

    Good (older) videos of exhaust mfg. Robotic welding robots are more common now. Hand welding is used for repair.
    AP 2012

    Flowmaster 2014

    Times constantly change in the auto industry for one. Mergers have broken the chain for old replacement parts.
    What happened to the old companies and plants?

    Now, exh. contract factories near assy plants receive pre bent metal pipe, pre stamped metal parts, brackets, substrate for cats.
    Assy only. No parts machining needs to be done. Entire systems are built and racked for shipment to the assy plant floor.
    Aftermarket runs a wider variety of product, not tied into vehicle assy plant production schedule or contracts.
    OEM and aftermarket build to order in batches, then change over tooling for next order.
    Usually run a certain product at least one shift or more before changeover. Depends on order size and parts on hand.
    Aftermarket has large whse for finished product, OEM plants very little, ship just in time. Sometimes welds are still warm.
    In my search, I hit all of those companies. It also takes some creativity and figure out what can be mix and matched. Walker seemed to have the best muffler but I have yet to hear it. Lol. I have no idea why their matching tailpipe does not fit even with the required reducer.

    I wish I kept the mid pipe from my svo when I replaced it with a NOS system some 10+ years ago. From what I can tell, the 84 svo and the turbo GT seem to have the same system. The tailpipe tips may not have had the resonators. The Ford replacement shows the same part number. If I can get a decent one made, I may make a spare or two.
    Fox Body/3rd Gen MCA Gold Card Judge
    84 SVO 24K miles, 85 Mclaren Capri Vert. 84 GT Turbo Vert.
    88 Mclaren Mustang Vert 20K miles, 89 Mustang LX Sport Vert,
    03 Mach 1 7900 miles, 74 Mustang II, 69 Mustang, 67 Mustang, 14 Mustang CS/GT,
    15 F150 FTX Tuscany, 16 F250 Crewcab, 67 Tbird 47K miles

  2. #27
    FEP Super Member gr79's Avatar
    Join Date
    Jun 2009
    SE Michigan


    Have had 2 single to dual tail pipes on the mustang
    oem 79 long chrome dual tip
    oem 85 svo short dual tip (current)

    The SVO one had baffles or resonator inserts. When the chrome outer rusted away, the baffles were still there.
    Cannot recall if the 79 set did.
    The identical dual tips on my 85 LTD LX did not have resonator inserts.

    49 state 79-80 looks to have same p/n 2.25" mid pipe, muffler, tail.

    I added an extra hanger before the muffler to the intermediate pipe.
    Has been holding up much better being more solid, safer, easier on the muffler connection welds.
    And if the front weld breaks (like it did once), the muffler/tail wont drop front first onto the pavement (like it did on the eway).
    Muffler is Thrush Turbo. Sounds real darn close to stock running into the dual tips, but is much lighter.
    Had the 79 dual tip chrome hanger bracket transferred and welded to the svo dual tips by the shop.
    Much later noticed they put it on the outside pipe rather than inside one. Had to mod the body side mount.

  3. #28
    FEP Super Member gr79's Avatar
    Join Date
    Jun 2009
    SE Michigan


    Even tried the later SVO dual exhaust y pipe, dual dump with 2 glass pack mufflers.
    Fit fine but never had the time to install properly to drive and really hear how they sounded.
    Could run the dual tips on the ds and 'dump' the ps muffler. Round ones tuck up ok on the ps.
    Even considered side pipes. Maybe someday just for fun.
    Have sfc's, so even Nascar or 70 Challenger T/A style flat tubes wont clear or sit high enough for ground clearance.

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