Headers for V8 cars, Please read
VIP 様式
Joined: Feb 2001
Posts: 4,410
Likes: 2
From: California
I am willing to pay for both even though the passenger side will be in my hands first, but I will just wait until I get both them, then I will get them installed at the same time. The piping doesnt matter to me I am just running exhausts anyways.
Last edited by LOTC; Jan 30, 2004 at 10:19 PM.
Wow, 40 RWHP!!!!??? That sounds fabulous. If this buy comes up again in the summer when I have a real job, thats probably the next mod I'll do.
Juust a few questions, is there much labor involved in the installation, is there any modification to the rest of the car, relocating the cats or anything like that? Will the heat shield still fit over the headers, etc?
And the cost for a pair of headers will be estimated at about $500-$600 right?
Juust a few questions, is there much labor involved in the installation, is there any modification to the rest of the car, relocating the cats or anything like that? Will the heat shield still fit over the headers, etc?
And the cost for a pair of headers will be estimated at about $500-$600 right?
Rookie
Joined: Nov 2003
Posts: 57
Likes: 0
From: Texas
Originally posted by SC400-V8
Wow, 40 RWHP!!!!??? That sounds fabulous. If this buy comes up again in the summer when I have a real job, thats probably the next mod I'll do.
Juust a few questions, is there much labor involved in the installation, is there any modification to the rest of the car, relocating the cats or anything like that? Will the heat shield still fit over the headers, etc?
And the cost for a pair of headers will be estimated at about $500-$600 right?
Wow, 40 RWHP!!!!??? That sounds fabulous. If this buy comes up again in the summer when I have a real job, thats probably the next mod I'll do.
Juust a few questions, is there much labor involved in the installation, is there any modification to the rest of the car, relocating the cats or anything like that? Will the heat shield still fit over the headers, etc?
And the cost for a pair of headers will be estimated at about $500-$600 right?
Im in for the SC guys 
like alstadt is saying this is the best bang for your buck 30-40 rwhp for $600 i need something so i can get a start on spanking this SC300 turbo's and GS400 back into the places 
Jbrady i have emailed you holla back @ me.
Philly
like alstadt is saying this is the best bang for your buck 30-40 rwhp for $600 i need something so i can get a start on spanking this SC300 turbo's and GS400 back into the places Jbrady i have emailed you holla back @ me.
Philly
Lexus Champion
Joined: Feb 2001
Posts: 3,124
Likes: 32
From: Texas
Originally posted by Philly#1 Lex
Im in for the SC guys like alstadt is saying this is the best bang for your buck 30-40 rwhp for $600 i need something so i can get a start on spanking this SC300 turbo's and GS400 back into the places
Jbrady i have emailed you holla back @ me.
Philly
Im in for the SC guys
like alstadt is saying this is the best bang for your buck 30-40 rwhp for $600 i need something so i can get a start on spanking this SC300 turbo's and GS400 back into the places Jbrady i have emailed you holla back @ me.
Philly
Nobody is claiming 30-40rwhp. It is not impossible but the target for BOTH manifolds is 20rwhp. These may actually improve the torque curve which will be even BETTER than a peak only number BUT... PLEASE understand that we just do NOT know how much power we will get until we get it
Im just excited thats all 
Driver
Joined: Apr 2003
Posts: 166
Likes: 0
From: Washington
Hey John, I already replied back to your email, hope you got it, if not let me know (Email: Rx7_2jock@hotmail.com). I'm definitely in !!
Lexus Champion
Joined: Feb 2001
Posts: 3,124
Likes: 32
From: Texas
IMPORTANT UPDATE>>>
A friend of mine just bought a 2003 LS430 and that gave me a chance to give it a close inspection. It looks as though Lexus changed the manifolding for the 430 cars and these cars now share one part number so any 430 vehicle should represent the others. As it stands now I cannot say whether or not these headers will be a direct bolt in for the newer cars. The 430 vehicles have 3 catalysts and the ones bolted to the manifolds are definitely different. I will try to update soon but this project has gotten complicated.
A friend of mine just bought a 2003 LS430 and that gave me a chance to give it a close inspection. It looks as though Lexus changed the manifolding for the 430 cars and these cars now share one part number so any 430 vehicle should represent the others. As it stands now I cannot say whether or not these headers will be a direct bolt in for the newer cars. The 430 vehicles have 3 catalysts and the ones bolted to the manifolds are definitely different. I will try to update soon but this project has gotten complicated.
Lead Lap
Joined: Apr 2003
Posts: 465
Likes: 1
From: Florida
Originally posted by LordoftheCelsiors
I am willing to pay for both even though the passenger side will be in my hands first, but I will just wait until I get both them, then I will get them installed at the same time. The piping doesnt matter to me I am just running exhausts anyways.
I am willing to pay for both even though the passenger side will be in my hands first, but I will just wait until I get both them, then I will get them installed at the same time. The piping doesnt matter to me I am just running exhausts anyways.
Just checking up on the progress. Im definitely in for the passenger side in a few months provided it wont cause any negative side effects to the engine... but I will eventually want both performance headers, and might just wait until both are available. I think there will be a serious market for these parts once people start fittng them, they are proven worthwhile, and proven gains start being publisized.
Much thanks to JBrady for his hard work in organizing this project, and to all others who have contributed.
Much thanks to JBrady for his hard work in organizing this project, and to all others who have contributed.
Lexus Champion
Joined: Feb 2001
Posts: 3,124
Likes: 32
From: Texas
Yes, this project is going forward. There are just a few people with 430s that are in on the GB with the majority of people having a 98-00 GS400 (and in at least 2 cases a 98-00 LS400 )
Let me take a moment and try to shed some light on the complexity of my original design goal. The plan has ALWAYS been to build headers for the GS400 and of COURSE the 98-00 LS400 This was the result of me PERSONALLY wanting headers for my car. Now, correctly assuming that the head flange would be the same on ALL Lexus V8 cars from 1990-2004 it was a fair guess that these (with minor tweaks) would bolt up to all of these cars. The BIG spoiler has been the steering column. On the LS400 it requires the drivers side to snake around it VERY closely. This is one of the main reasons for the difficulty of installation. Just removing the stock drivers side manifold is very HARD.
Next, the 1990-97 LS400 and the 1992-1997 SC400 really REALLY need manifold HELP
So, the plan was if these bolt on the head (they will) then all you need to do is relocate the cats and you are set. PROBLEM. Since the manifolds must be built very carefully to fit the primary vehicles we will NOT know if they will interfere with the SC steering column (or other parts) until a set is physically built and test fit. This is not a job for a beginner. We may get lucky and they will bolt right in. If so, full steam ahead. If not there is a chance we could rework them to fit if there is enough committed interest. As of now there are not 20 SC400 participants.
So, for GS400 and 98-00 LS and SC400s we will go ahead with the passenger side and based on the interest level... we will probably build the drivers side a month or so later. (depending on prepayments). Once the passenger side is built I will probably request on of the 1990-1997 400 owners (maybe both an LS and SC owner) to trial fit one on their car. If it fits then we can get a very good idea about the drivers side. There is an Phoenix based 92 SC400 that I will ask to go by the shop for measurements.
There is todays update. Please, everyone stay relaxed. We shall do our best to make this work one way or another.
)Let me take a moment and try to shed some light on the complexity of my original design goal. The plan has ALWAYS been to build headers for the GS400 and of COURSE the 98-00 LS400
This was the result of me PERSONALLY wanting headers for my car. Now, correctly assuming that the head flange would be the same on ALL Lexus V8 cars from 1990-2004 it was a fair guess that these (with minor tweaks) would bolt up to all of these cars. The BIG spoiler has been the steering column. On the LS400 it requires the drivers side to snake around it VERY closely. This is one of the main reasons for the difficulty of installation. Just removing the stock drivers side manifold is very HARD.Next, the 1990-97 LS400 and the 1992-1997 SC400 really REALLY need manifold HELP
So, the plan was if these bolt on the head (they will) then all you need to do is relocate the cats and you are set. PROBLEM. Since the manifolds must be built very carefully to fit the primary vehicles we will NOT know if they will interfere with the SC steering column (or other parts) until a set is physically built and test fit. This is not a job for a beginner. We may get lucky and they will bolt right in. If so, full steam ahead. If not there is a chance we could rework them to fit if there is enough committed interest. As of now there are not 20 SC400 participants.
So, for GS400 and 98-00 LS and SC400s we will go ahead with the passenger side and based on the interest level... we will probably build the drivers side a month or so later. (depending on prepayments). Once the passenger side is built I will probably request on of the 1990-1997 400 owners (maybe both an LS and SC owner) to trial fit one on their car. If it fits then we can get a very good idea about the drivers side. There is an Phoenix based 92 SC400 that I will ask to go by the shop for measurements.
There is todays update. Please, everyone stay relaxed. We shall do our best to make this work one way or another.