Jun-TW headers available at l-tuned
#31
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Please make the headers for the isS350!!!!!!!!!!!!!!!!!!!
The IS250 already has two options for headers (meagan and Juntw), but the IS350 has no options!!
I know that someone will say that the megan and juntw fit on the IS350, but remember the meagan and juntw are designed for the IS250 engine (i.e. displacement, etc...). The performance of the two headers on an IS350 is unknown and probably marginal at best!!!
MAZZZURI, please drop the IS250 and design for an IS350!!! I'm sure that you could get half a dozen CL members willing to bring their IS350 to your shop!!!!
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The IS250 already has two options for headers (meagan and Juntw), but the IS350 has no options!!
I know that someone will say that the megan and juntw fit on the IS350, but remember the meagan and juntw are designed for the IS250 engine (i.e. displacement, etc...). The performance of the two headers on an IS350 is unknown and probably marginal at best!!!
MAZZZURI, please drop the IS250 and design for an IS350!!! I'm sure that you could get half a dozen CL members willing to bring their IS350 to your shop!!!!
![Woohoo](https://www.clublexus.com/forums/images/smilies/woohoo.gif)
and as far as headers for the 250, i think the megans are crap and Jun is over priced. i'm willing to bet there is more 250's then 350's around even though the majority of people on here may own a 350.
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#34
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I never said I was going to make a header only for the 250. The reason I have a 250 is because it is easier to dyno since it's a 6 speed. The manifold is 100% the same for both engines, what will fit the 250 will fit the 350 and like you guys said, only the sizes will be a bit different.
#35
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#36
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There are four O2 sensors. The wideband are in front of the primary cats. The narrowband are after the primary cats. You would be foolish to try and adjust AFR after a cat - the readings won't be very accurate.
#37
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I never said I was going to make a header only for the 250. The reason I have a 250 is because it is easier to dyno since it's a 6 speed. The manifold is 100% the same for both engines, what will fit the 250 will fit the 350 and like you guys said, only the sizes will be a bit different.
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#38
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I never said I was going to make a header only for the 250. The reason I have a 250 is because it is easier to dyno since it's a 6 speed. The manifold is 100% the same for both engines, what will fit the 250 will fit the 350 and like you guys said, only the sizes will be a bit different.
FWIW, the 350 is easy to dyno if you disable TRAC / VSC, use ECT-Snow, select 4th gear in manual mode, and avoid WOT below 3K RPMs (or 2K RPMs in 3rd gear).
#39
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I will as promised by the end of the year. I already have a IS250 sitting at the shop waiting to get fondled and they will not be anywhere near the $1700price tag... I can tell you there is maybe $40 bucks worth of material in there and maybe 2 hours of labor on a slow day... $1700 is just crazy.
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we need more info, bc if this is true then thats a major let down, just when i thought there was some hope for some considerable power increase for the 250. his site is still up and running though......hopefully he'll come on and say something.
#45
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my different route is having some long tube built here locally with some cat work and other items. Trust me, I have learned that bolt on is not the way to go.
This was PM'd to me this weekend
http://www.honda-tech.com/zerothread/2151269
it wouldn't make a difference anyways, because there is no way 250 headers will work for a 350 due to the port size.
This was PM'd to me this weekend
http://www.honda-tech.com/zerothread/2151269
it wouldn't make a difference anyways, because there is no way 250 headers will work for a 350 due to the port size.