Catback Exhaust – Explained

25 Comments

  1. 0
    Posted 04/06/2014 at 6:02 | Permalink

    how about straight pipe?

  2. 0
    Posted 04/06/2014 at 6:04 | Permalink

    Very fascinating equation to determine the best mated hp for a specific
    inlet measurement. Thanks man, this is excellent stuff!

  3. 0
    Posted 04/06/2014 at 6:04 | Permalink

    Maybe I just misunderstood you, but did you say that a 140WHP engine will
    see an 85WHP gain from an exhaust system?

  4. 0
    Posted 04/06/2014 at 6:44 | Permalink

    My Forester XT splits into two pipes and two mufflers after the resonator.
    Is there any benefit to this or is this just for looks? N/A versions don’t
    split.

  5. 0
    Posted 04/06/2014 at 7:38 | Permalink

    So if i had say 2250 hp, would I find significant gains from a 22.6″
    catback exhaust?

  6. 0
    Posted 04/06/2014 at 7:55 | Permalink

    ive got a question i recently bought a catback exhaust and my engine is
    stock. Does the HP stay the same without tuning or does the car give more
    power off the bat? thanks 

  7. 0
    Posted 04/06/2014 at 8:44 | Permalink

    If you’re going to increase the diameter of the exhaust system, then you
    should include the cat as well. I would just convert to a dual exhaust
    system (two cats & split manifold). That way you wouldn’t need an increase
    in diameter and could use two stock exhaust systems.

  8. 0
    Posted 04/06/2014 at 9:17 | Permalink

    most 4 cylinder engines require a certain amount of back pressure to
    increase low end torque, do these aftermarket kits reduce the amount of
    usable torque?

  9. 0
    Posted 04/06/2014 at 9:52 | Permalink

    I was going to upgrade but with a stock engine is futile.. 

  10. 0
    Posted 04/06/2014 at 10:26 | Permalink

    You forgot weight reduction – as most Stainless and all the more Titanium
    pipes are lighter than stock ;)

  11. 0
    Posted 04/06/2014 at 10:39 | Permalink

    That has alot of restrictions 

  12. 0
    Posted 04/06/2014 at 11:10 | Permalink

    my 97 Bonneville sse came from the factory with catback as it advertised on
    sticker sheet.

  13. 0
    Posted 04/06/2014 at 11:45 | Permalink

    Thanks!!!! I’ll share this video on Facebook 

  14. 0
    Posted 04/06/2014 at 12:38 | Permalink

    Gained yourself a new subscriber!

  15. 0
    Posted 04/06/2014 at 13:35 | Permalink

    Subbed, I have a 3g eclipse gt that I’m working on and this knowledge
    helps.

  16. 0
    Posted 04/06/2014 at 14:09 | Permalink

    As far as performance goes, you forgot to mention one of the most critical
    points of any parts upgrades: how much does the Yonaka system weigh
    compared to the stock system?

  17. 0
    Posted 04/06/2014 at 14:57 | Permalink

    You can certainly see improvements replacing exhaust on some cars. I know
    the performance Toyota 4A-GE 20V Blacktop came with an exhaust manifold
    that had a few bends that were incredibly restrictive, where just replacing
    the manifold showed fantastic gains. So in cars with poor exhausts, it can show
    a bit of a difference. Not much though, because the engine isn’t putting
    out much power anyway.

  18. 0
    Posted 04/06/2014 at 15:15 | Permalink

    I saw that you also have a header video. Rather than clicking it, I have a
    question or two. First, with a catback exhaust, I can STILL use the stock
    cats, cant I? If yes, what about the headers, same deal?

  19. 0
    Posted 04/06/2014 at 15:38 | Permalink

    Like your videos i will subscribe 

  20. 0
    Posted 04/06/2014 at 15:41 | Permalink

    Does a catback work with stock cats or do you have to buy new ones?

  21. 0
    Posted 04/06/2014 at 16:03 | Permalink

    so I gotta 92 civic with a 96 itr engine in it a few mods..spec r cams,dc
    sports ceramic header and a cat back exhaust system wich I believe to be
    2.5 inch..maybe 2and 1/4 inside not sure rly…for my catalytic conv…I
    got like a cheap ebay cat…id like to get a magnaflow catalyser..and maybe
    a muffler too cuz the cat back is just too loud!(being a 4.5 inch tip)..I
    was wondering wat u reckon about that? anyone who knows about this rly..tnx

  22. 0
    Posted 04/06/2014 at 16:10 | Permalink

    What about the overpipe and front pipe in a exhaust system? Is that front
    of the cat? 

  23. 0
    Posted 04/06/2014 at 17:06 | Permalink

    But you need back pressure for the vehicle to run efficient in all
    ranges of rpm. 

  24. 0
    Posted 04/06/2014 at 17:35 | Permalink

    Im confused did you said it would bump the hp to 225 or the exhaust is fit
    for a car that has 225 hp?

  25. 0
    Posted 04/06/2014 at 18:05 | Permalink

    I’m curious sound difference between one with resonator and one without it.
    Which one would most likely to make muffling sound? and/or deeper sound?

    Also, I’ve heard having stupid wide pipes are going to loose back pressure
    which results in lose of hp. Is it right?

    By the way, nice video.