Hooniverse Asks: What's the Weirdest Exhaust System You've Ever Seen?

By Robert Emslie Feb 17, 2016

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Yesterday we talked about weird intakes, and boy, were there some odd bodkins brought up! Of course for every suck there’s got to be a blow, and so keeping inline with weird engine breathing apparatuses, today we’re looking for the oddest exhausts.
This question has been rattling around in the Castrol-covered raisin I call a brain ever since I went to the Peterson Museum a few weeks back. While there I happened upon a display of the mechanical systems that underlie a Maserati Quattroporte laid bare under accusatory spot lights. One of the things that struck me most about it was the weird-ass exhaust that had separate chambers for when you wanted to bring the noize, and for when you wanted to run silent and run deep.
It’s that kind of weird we’re looking for here, as well as crazy mandrel-bent equal-length headers and those freaky flathead exhausts that don’t seem to come from anywhere. What is the weirdest exhaust you’ve ever seen?
Image: Kreissieg.ocnk.net

59 thoughts on “Hooniverse Asks: What's the Weirdest Exhaust System You've Ever Seen?”
  1. I’m going back with the hot Vee setup. It’s a thing of beauty.
    http://bestcarmag.com/sites/default/files/8846809F1FerrariEngine.jpg
    One of the cool little details in Disney/Pixar’s “Cars” movies that only car folks would notice was Francesco Beroulli’s mom being modeled after a Ferrari 312 with the exhaust headers being her hair braids.
    http://images2.wikia.nocookie.net/__cb20130420045932/worldofcarsdrivein/images/thumb/0/00/Mama_bernoulli.png/500px-Mama_bernoulli.png

  2. The 2nd gen mr2 systems sort of weird me out when seen out of the car. Does the f body hump in the passenger foot well for the exhaust count as an exhaust feature?

        1. Yes, and it was refillable (with new beads), by removing the factory plug, shaking out the old beads with a special tool, then sucking the new beads in and installing a service plug. All detailed in GM factory service manuals of the time.

          1. An old parts guy told me a fable about a mountain of those used beads in West Virginia, just waiting for someone to figure out a cost-effective way to extract the tiny amounts of rare metals from them.

      1. Yeah my cali model datsun 710 wagon had the hump under the driver seat so when i wanted to put a new seat in it i had to cut the cat out, weld a test pipe in, make the floor flat, THEN i was able to put a nice seat in. It ain’t pretty, but my ass doesn’t have eyes so who cares 😛

        View post on imgur.com

        View post on imgur.com


        My favorite cats were the “nuclear reactors” in the early rx-7’s. They were known to get so hot that if you parked in high grass they would start fires.

        1. The thermal reactor was on the RX-4 and the Cosmo, too. They also have the unique property of being heavy as hell.

          1. Ah you are right, thermal reactor, with any luck the few people i told about it incorrectly spread that misinformation as well so people are convinced it takes fusion to make rotary emissions half decent 😛

  3. ’68 GTOs with the Turbo 400 are the only cars I’m aware of that used “tuner pipes”, split tailpipes that had a length of pipe that was pinched shut at the end, above the pipe with the outlet:
    http://www.gardnerexhaust.com/1968-gto-exhaust-system.html
    I’ve only ever seen pictures or drawings of them; I imagine they were never replaced with the same thing when the originals rusted out.
    http://www.gardnerexhaust.com/img/68gtotunerpipe1.jpg

      1. My assumption would be that it is there to even out exhaust pulses in much the same way a hammer arrestor works in a house’s copper plumbing.

    1. When I was a kid, a friend’s older brother had a Challenger T/A, in white, with the dog dish hubcaps. That exhaust was crazy.

  4. I just thought of the right answer for yesterday but will put it here. I lived in Seattle when Mount St. Helens erupted. Fine abrasive volcanic ash sullied the air of communities near the mountain for several months afterward, clogging carbs and scoring cylinders. One somewhat popular solution was to use a canister filter mounted to a tall pipe off the front fender because the ash tended to dissipate above 6′. For a few years afterward it was advisable to avoid any used car with a strange hole cut in the bodywork.

      1. I’d love to see that. My Dad worked for KOMO in those days, he brought home a lot of crazy stories about Dave and the other news guys putting themselves in harms’ way to cover the volcano.

    1. When I was in the aviation battalion at Ft. Lewis (83-85), a good friend of mine was a flight medic. She told me stories about flying medivac/SAR flights around Mt. St. Helens
      pretty much around the clock in the days after the eruption. They only had a
      few hours of flight time before the particulate filters would clog and
      starve the engine for air. Twice they had flameouts and had to autorotate down. They simply swapped the filters on the ground and took off again. No way
      could anybody do that sort of thing now.

        1. Sort of. The 95/96 V4 exhaust is essentially the same thing with only the right-hand of the two long pipes present. My guess is this was a quick and cheap way to improve breathing somewhat while still using as much of the extant tooling as possible.

        1. I would ordinarily agree with you — any design element masquerading as something it isn’t is normally offensive to me on principle. And I did initially dislike them on the Kizashi too, until I realized that they were pretty much the only thing on the car that kept it from being completely generic looking. Now I kind of enjoy them. Because Mecha.

      1. That is a rather unfortunate location for hot exhaust components if you need to be under the hood bonnet for any reason.

      1. For the GTO it was. Lutz couldn’t get a proper L/R valence produced in time. It may have needed another crash test or something. Someone will set me right.

    1. I wonder how they make these images. Image stitching/shopping, sure, but do they lift the car on a two-post three-arm lift?

  5. Pontiac Fieros had a fake dual exhaust (with quad tips); only the right side was active. But instead of just having the tips in place on the left side there is a fair amount of pipe attached that just floats up into the engine bay and doesn’t connect to anything.

    1. I didn’t know that the Fiero’s engine bay is so roomy you can literally stand next to the engine… 😉

  6. Weird exhausts? Curtis Wright R-3350-93A. 18 cylinder radial-not rotary-in two rows of 9 cylinders with the exhausts of three sets of six cylinders joined together and each set feeding into a power recovery turbine which is geared back to the crankshaft. Each PRT returned 280hp to the engines output by recovering the waste heat in the exhaust stream. 3500bhp for five minutes but 2800bhp until it runs out of fuel and/or oil. by GOD that is a fearsome engine used in SPADs, B-29s, Neptunes and Connies. Curtis-Wright-when you absolutely must turn fuel and oil into smoke and noise….

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