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Breathe Easy: Int. & Exh. Headers + Mufflers and Pipes

This is the place to discuss various exhaust systems on the marketplace, what works bestin which application, and for which cars. You are also invited to post your questions or share your expertise in this area.


  • toymannntoymannn Posts: 1
    Help.... Trying to locate a performance exhaust for a 97 V6 T100 4x4.
    Have tried several web sights .. They have nothing for these trucks.
    JARDINE discontinued the system they produced...
  • Stever@EdmundsStever@Edmunds YooperlandPosts: 38,921
    SEMA has a lot of aftermarket companies listed at this link. You may want to scroll through that list for possibilities.

    Steve, Host
  • I have a 2000 Kia Sephia and would like to put an exhaust system on it. I would like it to have a deep rumble. I do know a few things about this subject but am having some trouble finding what I am looking for. :confuse:
  • MrShift@EdmundsMrShift@Edmunds Posts: 43,633
    I believe Flowmaster makes a muffler for you car, Series40, and Eastern Manufacturing makes a free-flow catalytic converter. You could Google for these or similar products.

    You will get a nice sound but don't expect a lot of power increase for the money you spend---if you use both the new Cat and the Flowmaster, you might pick up 3-5HP or something.
  • i installed a flowmaster muffler on my s10 truck. it made it louder, then i cut the tailpipe off that left the end of the muffler. it made it louder again, is there anything else that can be done to make the exhaust even louder without buying more stuff?
  • driftracerdriftracer Posts: 2,692
    And by the way, LOUD has no relationship to POWERFUL or FAST - just decals/stickers....
  • darren1darren1 Posts: 3
    Thinking of putting a full stainless system on my 99 accord 2ltr es v tech(including down pipe).Does anyone know if I should leave the cat on or off.
    Coz I thought the engine needed some back pressure but without it , it has none.
    Also if I leave it out will it affect the running of the Ecu and v tech system.
  • MrShift@EdmundsMrShift@Edmunds Posts: 43,633
    You mean an exhaust with no mufflers at all? I don't think that's a good idea, no.

    It's hard to know the effects unless you dyno both ways. Also you'll have to plug a couple sensors here and there, and of course you'll be totally illegal.

    I think that unless you are doing something fairly radical on the OTHER end of the engine (intake, cams, etc.) that you'd be better off with a nice free-flow catalytic and a custom exhaust from the cat back. That should give you a little more HP (not much, maybe oh 4-6 HP) and a nice sound and you'll be legal and happy. Straight pipes with no muffler may indeed cost you HP and it'll make you daffy after a while listening to it on road trips.
  • Has anyone added the VW factory performance exhaust to a 99-and up Golf or Jetta?

    Does it really make any difference?
    Other than resale value.
    We have a very tough inspections in Maine. You can add a performance muffler but, it must be quite at idle
    The dealer has one with a lifetime warranty, but $500.00? See link. - -
  • darren1darren1 Posts: 3
    Thanks Mr shiftright for your help but am still not to sure what way to go. Heard so many stories over here in Scotland its hard to see what way to go. Theres the cat then the back box on my system so I dont know if just the back box would provide enough back pressure. As for the illegal side of things once the car has passed what we call an mot we then take the cat out leaving a straight through system with just the back box. Do you know of any Honda only sites where I could ask. Cheers Darren 1
  • MrShift@EdmundsMrShift@Edmunds Posts: 43,633
    I don't think there's any easy answer for you. You'd have to check on a dyno to see what has happened. But I can tell you with some confidence that with an engine of the size of your car, with exhaust on or off or in the middle, it's not going to make a lot of difference and might, as you say, decrease your HP. I'd say the best solution if you don't want to dyno test and you were say racing off road, would be a well-designed free-flow back box and no cat.
  • cca05cca05 Posts: 1
    Has anybody installed Dynatech Headers on a Magnum that would be willing to discuss the installation. If you're thinking about installing a set, what do you know about them?
  • MrShift@EdmundsMrShift@Edmunds Posts: 43,633
    You might shoot this question to Skip Barber Racing Schools as they run Magnums in their programs and may have breathed on them.

    But also hang around here and we'll see if anyone has tried this. It's a pretty specific question on a new car, so you may not get a response right away.

    Also, you can "google around".
  • wpu2007wpu2007 Posts: 1
    just by a flowmaster muffler and get custom 2.5" piping and throw on a tip. maybe u can help me out now, do the AIT sensor resistor add horsepower or waste time and is a throttle body spacer worth the time to put in. thanks
  • MrShift@EdmundsMrShift@Edmunds Posts: 43,633
    I don't see the point of the throttle body spacer if you aren't doing intake work.

    No muffler "adds" horsepower. You'd probably get the most horsepower by throwing the muffler away. But a larger throttle body with a custom intake and a free-flow exhaust, that could give you some HP.

    I'm not keen on these spacers. The machining has to be really good as does the fit...anything sloppy and again you are probably going to lose HP.
  • Thank you for your input. And I thank you again, for your help.
  • darren1darren1 Posts: 3
    Hi Mr Shiftright Darren1 here.Am still not sure what to do but am tryin to locate a Honda mechanic over here that might be able to help (Maybe some inside info)I'll let you know the outcome if there is one.Haha.Thanks again.Darren1. P.s If you have any ideas of someone I could contact over here let me know Thanks.Darren1 !!Scotland!!
  • MrShift@EdmundsMrShift@Edmunds Posts: 43,633
    A Honda in Scotland? Why didn't you buy a Scottish car? (Yes, they used to make them, but that was a while ago) :P
  • only1harryonly1harry Posts: 1,136
    For all those out there that are talking about removing the CAT (using a straight pipe) and mufflers. These mods can make your car extremely LOUD. This means breaking noise ordinances and getting tickets, and you most likely will get annoyed with the noise after a while.
    We get cars with straight pipes and no mufflers that come to race all the time and they 're extremely loud. Most autocross and motorsports clubs' rules say all cars must be muffled. They will fail a car at tech inspection if there 's no muffler on a car that's racing in one of the normal car classes and not a 'race' class. A car with no muffler and no CAT is rediculously loud in any car.. which is ok if it's a trailer queen or used for racing purposes only, but if it's a street driven car or a daily driver, forget about removing these.
    Get a free flow CAT and the aftermarket exhaust you buy will come with a less restrictive muffler. Custom 2.5" pipes with no muffler and no CAT and all that are if you 're going to be racing the car or only drive it on the street to get to and from the racing events (like me) and be very easy on the throttle as to not attract cops, but even then it's pain in the neck.

    Although the removal of these does add HP, there is no doubt about that, (and the back pressure stuff is a myth, to an extend. Today's exhausts & CATs are very restrictive), they are illegal in many states and if you have emissions inspection in your state or county, (or Scottland) you won't pass. In the county I live in they have no emissions inspection, but by law they have to put the car up on the lift and if they see that you have no catalytic converter on the car they immediately fail you.
  • purrnakpurrnak Posts: 4
    Okay, so the first thing people tell me when I ask how I can improve the performance of my car is "Buy a better car"

    Well I like modifying things (anything really) and when it comes to cars all I really find is crap parts if you have a crap car.

    I have a 1986 Hyundai Pony (yes this is where you laugh) Anyway, I'd like to toss a new muffler on it to give it a bit more power or at least a better look.

    Currently there is a tiny stock muffler that's been on there for at least 5 years on the end of it is a 4 foot long pipe that hangs out the back of my car. Don't get me wrong, it's all well mounted and I think the muffler is still in one piece and the piles coming off the engin are in pretty good condition.

    So 2 questions really:

    1. Can I toss on any performace muffler or am I stuck with what is made for this car, and

    2. How does the tip affect .. anything and could I just weld on anything that looks good?

    I've studied a bit of what a muffler does and how it works and I have a couple ideas for tip modifications to displace and distroy some of the sound so the tip isn't a big deal but I'd like to get a muffler.

    little extra question: Is there a good forum or place where a newb like me can learn basics to modifying cars that don't have mod parts available? hehe just image a pony with a body kit?
This discussion has been closed.