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Thread: The search for 20v 4age headers

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    Default The search for 20v 4age headers


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    Hi all,
    After a few weeks of research and more googling than i care for I have come up with a few questions for some of the more knowlegable and experienced guys on here, in the hope I can track down a solution for my car.

    I have a RWD AE86 with a BT 20v to be installed.

    As the motor will be in stock configuration, I am led to beleive that 4-2-1 TRI-Y configuration is the most ideal for this application as the car will be legal, and for street use mainly.

    The suitable options I am aware of are as follows:
    OBX
    http://www.ebay.com/itm/151003324309...84.m1423.l2649
    CXRacing
    http://www.ebay.com/itm/CXRacing-Equ...3ac67f&vxp=mtr
    Powercraft
    http://www.rhdjapan.com/power-craft-...2-1-ae86-51693

    I consider the powercraft to be the best option available however $1173 plus delivery to AUS is certainly not a very effective money vs performance ratio.
    This is why I have looked into other options such as CXRacing and OBX.
    The problem is, I understand from speaking to various people that ideally for the 4age in street form a primary length of 600-800 mm is ideal for more torque and no-where can i find a header with this spec. If its such common knowledge why do all the aftermarket headers only offer such short primary lengths?

    Can anyone suggest an alternative header that is available for under $1000.
    Is there anyone out there that can make a custom job a high standard in this price bracket?

    I wonder is it that the difference in performance is considered so minor that people dont bother and just use the TRD 4-1 copies for convenience or has everyone else also faced this problem?
    As a side note I dont have an affixiation with stainless its just that all the correct tri-y options seemed to be this way.

    Any help well appreciated, thanks

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    Veteran McLEVIN's Avatar
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    If you do a search for exahausts the general consensus is that trd copies are ideal for performance vs cost. Especially for a stock engine.
    Anthony from kaizen garage sells them from here.
    MOPAR or no car!

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    Hi, Thanks for your reply.
    I have read every topic on this forum regarding headers and although Im sure they are ok for the money, they are not 4-2-1 which is what I am looking for.




    Quote Originally Posted by McLEVIN View Post
    If you do a search for exahausts the general consensus is that trd copies are ideal for performance vs cost. Especially for a stock engine.
    Anthony from kaizen garage sells them from here.

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    I right my bad. I thought they did both.

    Have you gone into a performance exahust shop. I had custom headers. For my ae86 done by an exhaust shop. The whole system cost 1200. Headers to tips. That way they can build it how you want and your engine.
    MOPAR or no car!

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    I bought the OBX ones for my 20v conversion but i came across a couple of issues with them,

    -first thing was the actual mounting flange the 2 outer bolt holes were off and needed to be filed out to fit.
    -The pipe after the collector is from memory 2.5" which is way to big for most purposes.
    -If you already have a exhaust kit from the headers back these headers will not line up with it.
    -But my main issue was i had the Sam Q gearbox spacer in which tilts the engine forward for more clearance from the fire wall which caused the rear flange on the headers to foul on the chassis.

    Overall the quality was okay but just be weary of these things as they will need some work to fit otherwise.

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    if you are running a stock motor i can almost guarantee you will not feel the difference if the headers are 4-2-1 or 4-1 the motor is an NA and for any difference to be made you will need to make some pretty substantial mods to notice any difference with my motor i just got any pair of headers and put them on they love it
    the dyno pull to 300rwkw

    BT20v is making 300rwkw like i said i would without nitrous so now its time for some spray and see if she will run a 10s or less

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    Hair model Jacobxxx's Avatar
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    Lots of headers would suit you that come for 16v, not hard to mod the 16v ones to fit

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    Quote Originally Posted by pen15 View Post
    if you are running a stock motor i can almost guarantee you will not feel the difference if the headers are 4-2-1 or 4-1 the motor is an NA and for any difference to be made you will need to make some pretty substantial mods to notice any difference with my motor i just got any pair of headers and put them on they love it
    I know someone who had a lightly modded silvertop and he had a significant gain in the mid range going to 4-2-1
    My website: SQ Engineering - 4AGE and 3SGE upgrade/replacement parts

    - SQ Engineering on facebook -

    Please e-mail to contact me instead of sending a private message on here.

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    guys look at the std rwd 4age cast iron manifold and the pipes that attach to it .they are good for 200 hp as they had to use them in Group A car racing

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    Quote Originally Posted by Celica RA45 View Post
    guys look at the std rwd 4age cast iron manifold and the pipes that attach to it .they are good for 200 hp as they had to use them in Group A car racing
    the man has a point, at least that way you won't end up with a dog-shit collector design in a shiny wrapper.
    My website: SQ Engineering - 4AGE and 3SGE upgrade/replacement parts

    - SQ Engineering on facebook -

    Please e-mail to contact me instead of sending a private message on here.

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