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

Mr_ShiftrightMr_Shiftright CaliforniaPosts: 45,244
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.

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  • 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...
  • steverstever Viva Las CrucesPosts: 41,252
    SEMA has a lot of aftermarket companies listed at this link. You may want to scroll through that list for possibilities.

    Steve, Host

    Minivan fan. Feel free to message or email me -

  • 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:
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 45,244
    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.

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  • 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.
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 45,244
    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.

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  • 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
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 45,244
    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.

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  • 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?
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 45,244
    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".

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  • 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
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 45,244
    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.

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  • 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!!
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 45,244
    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

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  • 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?
  • joe53joe53 Posts: 1
    I recently purchased an '05 Sentra Spec-V, and was looking online for a cat-back exhaust system and a cold air intake for it. It doesn't seem like I have a whole lot of options besides the over priced Nismo parts. I did find a pretty good price on a Magnaflow exhaust system of about $400. I was just wondering if anyone had any recomendations, or if one brand worked better than another with this car.
  • only1harryonly1harry Posts: 1,136
    is to visit Nissan or Sentra specific forums and talk to people that have different exhausts on their cars. Some exhausts are better than others but the only difference you 're going to notice is the sound or noise they make in the price range you mention.
    Most exhausts don't make a noticeable difference unless you pay $800-1K for one. Then you 'll be able to tell the difference. $400 doesn't sound like a lot for an exhaust. Most decent exhausts are $495-600 and the good ones like I said before are big $$! You will not get the most out of your exhaust without a header, especially since you 're getting a cold air intake. The intake will increase HP and torque, but you 'll need a header to quickly dispose of that extra air you 're bringing in to the intake manifold. A header always makes more noticeable power than an exhaust. With an exhaust alone, many cars especially 4cyls, loose some low end torque but gain some at the top end of the RPM range. The header helps restore that and even add some in the mid range, especially a 4-2-1 design, and makes better use of your aftermarket exhausts to realize even bigger gains. Think of it as one big continuous pipe. What you 're doing is making the beginning bigger, leaving the middle the same, and again enlarging the end of it. Another fact is, that you will make more power with an Intake & header alone, than with an Intake & exhaust, unless your exhaust is extremely restrictive which I don't think it is on the Spec-V (isn't your exhaust bigger to begin with than the base Sentra's?).
  • corollercoroller Posts: 3
    Is it bad to put a short ram intake with a heat shield on my 01 corolla s?
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 45,244
    You mean the type that mount on the firewall?

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  • corollercoroller Posts: 3
    i can't explain it but this is what it looks like image thats how the intake looks like and the heat shield image so is it ok to put that in my engine?
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 45,244
    Yeah, I think it's okay but I'm not sure how much benefit you'll get. It kind of depends on how restrictive your normal airbox is, and also if this new filter ends up anywhere near a colder air stream than usual. I believe you gain about 1 HP for every 10 degree drop in temperature, so if this filter still sits under the hood and isn't way up front and down low, it's not going to be appreciably cooler. If the idea is to ram more air into the engine rather than try to cool it, that can also work up to a point, but again, don't expect to have your head jerked off or anything by some sudden rush of horsepower---not gonna happen.

    Best thing is to keep this filter clean as you can. Whether it works or not no one can say unless you actually put it on a dyno before and after. Sometimes the HP stays the same, sometimes you can gain 4-5 HP on the upper end of the rpm scale, and sometimes if the thing isn't designed very well, you'll actually lose HP.

    But have fun and I hope it works out for you.

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  • corollercoroller Posts: 3
    This is what its going to look like imageimageimage
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 45,244
    Yeah, the kind that mounts near the firewall, that's what I thought. I've seen 'em but havent' read any tests on them. Definitely not a cold air intake but the theory is that it will force more air than the stock airbox. You'll probably get a few HP out of that, I'd guess a maximum of maybe 6-8 and it could be less.

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  • sudan1sudan1 Posts: 2
    Hi, I would like to know if I can add and modify the intake and exhaust system on a 1979 450slc? If so what brand should I use and how much am I looking at?
  • Mr_ShiftrightMr_Shiftright CaliforniaPosts: 45,244
    I don't think you'll find anything off the shelf for such an old engine as regards the intake system. Perhaps you could rig up some kind of cold air intake or short tube ram air from another car but that engine compartment is so crammed I rather doubt it.

    On the exhaust side, you might look into brands like Ansa and Borla or even perhaps Flowmaster, but again, the age of this car will limit your choices. As usual, anything custom made for Mercedes will be expensive, so you might have to get creative and speak to a muffler shop. I use an Ansa on my 1980 Porsche and am quite pleased.

    This is kind of a slow heavy car so I'm not sure what you are trying to accomplish--perhaps better fuel mileage?

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