exhaust
Lexus Fanatic
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From: Under an IS F since 2008
LoL...
Lexus Test Driver
Joined: Nov 2008
Posts: 1,083
Likes: 1
From: Va Beach
Welcome back...
Please read my quoted post again...
Now TO add to this, when you remove the OEM Exhaust Tips / Collectors, you are left with a HUGE odd shaped hole to fill.
Many factors were taken into changing the unique Tips. But when all was said and done, our R&D concluded that leaving the OEM Tips / Collectors in place was the better choice..
This is what the inside of the Functional Collector looks like. This whole piece is permanently attached to the Dual Stacked Tips and Grill on the opposite side of the bumper. The entire assembly is held in place with 4 bolts.
Thank You
Joe Z
Please read my quoted post again...
Now TO add to this, when you remove the OEM Exhaust Tips / Collectors, you are left with a HUGE odd shaped hole to fill.
Many factors were taken into changing the unique Tips. But when all was said and done, our R&D concluded that leaving the OEM Tips / Collectors in place was the better choice..
This is what the inside of the Functional Collector looks like. This whole piece is permanently attached to the Dual Stacked Tips and Grill on the opposite side of the bumper. The entire assembly is held in place with 4 bolts.
Thank You
Joe Z
So you left the tips stock for many reasons but only offered up the "sleeper look" excuse for your reasoning behind it all?I'm not talking about tips being changed but the exhaust itself extending from the muffler, like the 0-60 Sema car. They didn't seem to have a problem filling the hole/void left by removing the tips. I really can't recall a custom exhaust setup retaining the stock exhaust tips. Thanks for the reply......I guess that answered my question
Don't take this the wrong way, but I think funding and cost cutting plays a role in your decision to retain the oem tips, but you're not listing that as a reason why......fearing negative publicity. Just my 2 cents, which isn't worth anything in here
BTW guys, I picked this up on another forum. Greddy's response to someone who asked them about doing their exhaust for the F. Dated today:
"Thank you for your interest in Greddy Products. At this time there are no plans in mass producing this exhaust system. However, you are not the only one who has expressed interest. If you can generate 20+ serious buyers, then we may be able to do a Group buy. The price is not set, however it may be in the amount of $2000 U.S. If you are interested and can locate 20+ serious buyers via forums/ car clubs, please call 949-588-8300 for more details. Also, you are not the only one whom I've given this information to, try going through some popular IS-F forums. There might be a group already being formed."
$2K and they'll do us a favor
Lou
"Thank you for your interest in Greddy Products. At this time there are no plans in mass producing this exhaust system. However, you are not the only one who has expressed interest. If you can generate 20+ serious buyers, then we may be able to do a Group buy. The price is not set, however it may be in the amount of $2000 U.S. If you are interested and can locate 20+ serious buyers via forums/ car clubs, please call 949-588-8300 for more details. Also, you are not the only one whom I've given this information to, try going through some popular IS-F forums. There might be a group already being formed."
$2K and they'll do us a favor
Lou
BTW guys, I picked this up on another forum. Greddy's response to someone who asked them about doing their exhaust for the F. Dated today:
"Thank you for your interest in Greddy Products. At this time there are no plans in mass producing this exhaust system. However, you are not the only one who has expressed interest. If you can generate 20+ serious buyers, then we may be able to do a Group buy. The price is not set, however it may be in the amount of $2000 U.S. If you are interested and can locate 20+ serious buyers via forums/ car clubs, please call 949-588-8300 for more details. Also, you are not the only one whom I've given this information to, try going through some popular IS-F forums. There might be a group already being formed."
$2K and they'll do us a favor
Lou
"Thank you for your interest in Greddy Products. At this time there are no plans in mass producing this exhaust system. However, you are not the only one who has expressed interest. If you can generate 20+ serious buyers, then we may be able to do a Group buy. The price is not set, however it may be in the amount of $2000 U.S. If you are interested and can locate 20+ serious buyers via forums/ car clubs, please call 949-588-8300 for more details. Also, you are not the only one whom I've given this information to, try going through some popular IS-F forums. There might be a group already being formed."
$2K and they'll do us a favor
Lou
Lou
Rookie
Joined: Oct 2008
Posts: 49
Likes: 7
From: Santo Domingo
to date the greddy is a one off concept for the 0-60 sema is-f
lou
good job on your diy project..
Thank you for the kind words. !
I wouldn't really say anyone has stayed away... It was more like they were not available till just last week..
We had a few units off the first production run ship last week and this past saturday we installed a production unit on crazympg's is-f.
We left the oem tips / collectors untouched for many reasons..
For starters, our exhaust will have "sleeper look" when you look at just the tips.. But when you duck under the rear bumper its a whole different story.
Plus, they are specific to the is-f and must function just as designed by the japanese lexus engineers.
We took many pics of the install and should hopefully have them up sometime today.
Stay tuned for that thread..
Thanks
joe z
lou
good job on your diy project..
Thank you for the kind words. !
I wouldn't really say anyone has stayed away... It was more like they were not available till just last week..
We had a few units off the first production run ship last week and this past saturday we installed a production unit on crazympg's is-f.
We left the oem tips / collectors untouched for many reasons..
For starters, our exhaust will have "sleeper look" when you look at just the tips.. But when you duck under the rear bumper its a whole different story.
Plus, they are specific to the is-f and must function just as designed by the japanese lexus engineers.
We took many pics of the install and should hopefully have them up sometime today.
Stay tuned for that thread..
Thanks
joe z
pics, pics please!!!!!!!!!
This is my take on the exhaust situation standing....
As far as the JOE-Z one, it truly looks like a well manufactured exhaust. Very clean piping, just as his one for the ISX50's are. Now I'm SURE that if JOE-Z wanted to creating something with Tips he could have, why wouldn't he, they did it for the regular 2IS right? So that either means two things...1)There is an actual benefit to leaving the stock tips, and an "Aerodynamic" reason the Japanese designed the car like that, oh and the "sleeper look" which many M5 guy's do. OR 2) Yeah maybe there was a corner cut in that aspect for pricing or whatever it might be.
The Greddy to me looked like an EXCELLENT choice for IS-F owners. The tips were perfect, the "cutout" was filled nicely, not too sure about those burnt tips but other then that it's a fan favorite. This is good news from Greddy in the willingness to produce the exhaust, and I'm sure we wouldn't have a problem getting 20+ people together for it either. BUT...onto next quote....
LO, is absolutely right. GOD FORBID what if something happened to an F, and the curse hit. What would you do? Call up Greddy and ask for new mufflers? Yeah...I'm sure you could do that without a problem...but also get charged an Arm & Leg for whatever it is they make for you, because at that point it would almost be "customed" to you (if that makes any sense )
Anyway, whats your take on the JZ exhaust LOBUX?
As far as the JOE-Z one, it truly looks like a well manufactured exhaust. Very clean piping, just as his one for the ISX50's are. Now I'm SURE that if JOE-Z wanted to creating something with Tips he could have, why wouldn't he, they did it for the regular 2IS right? So that either means two things...1)There is an actual benefit to leaving the stock tips, and an "Aerodynamic" reason the Japanese designed the car like that, oh and the "sleeper look" which many M5 guy's do. OR 2) Yeah maybe there was a corner cut in that aspect for pricing or whatever it might be.
BTW guys, I picked this up on another forum. Greddy's response to someone who asked them about doing their exhaust for the F. Dated today:
"Thank you for your interest in Greddy Products. At this time there are no plans in mass producing this exhaust system. However, you are not the only one who has expressed interest. If you can generate 20+ serious buyers, then we may be able to do a Group buy. The price is not set, however it may be in the amount of $2000 U.S. If you are interested and can locate 20+ serious buyers via forums/ car clubs, please call 949-588-8300 for more details. Also, you are not the only one whom I've given this information to, try going through some popular IS-F forums. There might be a group already being formed."
$2K and they'll do us a favor
Lou
"Thank you for your interest in Greddy Products. At this time there are no plans in mass producing this exhaust system. However, you are not the only one who has expressed interest. If you can generate 20+ serious buyers, then we may be able to do a Group buy. The price is not set, however it may be in the amount of $2000 U.S. If you are interested and can locate 20+ serious buyers via forums/ car clubs, please call 949-588-8300 for more details. Also, you are not the only one whom I've given this information to, try going through some popular IS-F forums. There might be a group already being formed."
$2K and they'll do us a favor
Lou
)Anyway, whats your take on the JZ exhaust LOBUX?
Lexus Fanatic
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Joined: Nov 2004
Posts: 13,441
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From: Under an IS F since 2008
So you left the tips stock for many reasons but only offered up the "sleeper look" excuse for your reasoning behind it all?I'm not talking about tips being changed but the exhaust itself extending from the muffler, like the 0-60 Sema car. They didn't seem to have a problem filling the hole/void left by removing the tips. I really can't recall a custom exhaust setup retaining the stock exhaust tips. Thanks for the reply......I guess that answered my question
Don't take this the wrong way, but I think funding and cost cutting plays a role in your decision to retain the oem tips, but you're not listing that as a reason why......fearing negative publicity. Just my 2 cents, which isn't worth anything in here
You read nothing else I posted.
You are comparing a "one off" exhaust, to a system that acually has to function for the everyday consumer as designed.
You asked a question and it was answered it. Yet still drew up your own assumption...
The is the last time I will answer YOU in this thread.
We decided NOT to replace or redesign the OEM Exhaust Tip / Diffuser / Collector.
It is a FUNCTIONAL OEM part that works as designed to properly manage Exhaust Flow as it exits the rear of the IS-F.
Originally Posted by Lexus Tech Info
A true high-performance engine relies on outstanding support systems and thoughtful engineering that touches every detail. The Lexus IS F's unique stacked quad diffusers, for example, make more than a visual statement. They play an important role in a high-performance exhaust system by reducing backpressure. The stainless steel exhaust system starts with tubular exhaust manifolds and integrated catalysts. Next come dual 2.4-inch diameter front pipes that are joined before a pre-muffler and 2.7-inch single center pipe, after which the system splits into two 2.1-inch pipes and enters dual 16.8-liter mufflers.
The Stacked Tips back side are shapped into a funnel type design which I would say is another term for "diffusers"...
See here for more detailed diffuser definition..
http://en.wikipedia.org/wiki/Diffuser_%28automotive%29
Bottom: Bottom-view. Top: Side-cut-view, the red circles mark the front and rear diffuser respectively
The Exhaust diffusers help smooth the exhaust flow, to eliminate lift from the exhaust as it exists the vehicle at high speeds. Lexus found that in high speed testing, that the billowing effect from the exhaust caused rear end lift, and skittishness in the handling.
The diffusers eliminate this effect.
I work for Lexus, and am trained by Lexus. I hope that this clears things up.
The diffusers eliminate this effect.
I work for Lexus, and am trained by Lexus. I hope that this clears things up.
Lexus Champion
Joined: Jun 2008
Posts: 2,162
Likes: 10
From: Dallas, Texas
I personally love the Joe-Z exhaust. That is my next mod for the F. I like the way it sounds and the fact the tips are left stock. The F is unique, why not leave it like that. It was designed with the tips not connected for a reason 
I like the Greddy with the exception of the burnt tips, that just doesn't fit the F style in my opinion.
I also like Joe-Z because you can actually talk to the guy who made the exhaust. If anything were to ever go wrong, he's only a PM away. He also seems to know his stuff and has always responded to any questions I have, which shows that he cares about his customers and his products, another reason I would give him my business and money (in my opinion).
I have a Joe-Z intake on order and will hopefully get the exhaust in the beginning of next year
I like the Greddy with the exception of the burnt tips, that just doesn't fit the F style in my opinion. I also like Joe-Z because you can actually talk to the guy who made the exhaust. If anything were to ever go wrong, he's only a PM away. He also seems to know his stuff and has always responded to any questions I have, which shows that he cares about his customers and his products, another reason I would give him my business and money (in my opinion).
I have a Joe-Z intake on order and will hopefully get the exhaust in the beginning of next year
oh I've seen the 0-60 Greddy exhaust IS-F up close at the SEMA auto show and while I think the design has merit, I didn't like how they actually had to cut or melt the bottom part of the bumper where the bottom exhaust tip is. If you look at closer pictures, you can see that the bumper had to be modified alittle which would mean that you wouldn't be able to put back the stock stacked exhaust tips without buying a whole new bumper...just to let you know...=P
haha I shuddup now...
haha I shuddup now...
Last edited by CrazyMPG; Dec 16, 2008 at 02:40 AM.
Lexus Fanatic
iTrader: (10)
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Posts: 13,441
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From: Under an IS F since 2008
Yes - that is correct math. Posted two months ago in a thread you acually posted in.
IMHO, that is pretty good considering there is more piping over the oem.
Thank You for your inquiry.!
IMHO, that is pretty good considering there is more piping over the oem.
Thank You for your inquiry.!
Last edited by Joe Z; Dec 16, 2008 at 08:49 AM.
Considering that Lexus has already maximized weight savings in other areas of the car (i.e. the hood, which we've discussed to death ), it shouldn't be a surprise that the OEM exhaust components are already relatively light-weight.
I think the real joy is the expected 20-25rwhp that this will offer.
), it shouldn't be a surprise that the OEM exhaust components are already relatively light-weight. I think the real joy is the expected 20-25rwhp that this will offer.