Headers for V8 cars, Please read
EV ftw!!!
Joined: Nov 2002
Posts: 8,970
Likes: 563
From: Lake Ontario
Originally Posted by lexforlife
one question
does the engine need to be removed to install these on a 99 gs 400 and if we are forced induced can these headers dfeliver even better perf
does the engine need to be removed to install these on a 99 gs 400 and if we are forced induced can these headers dfeliver even better perf
As far as these headers being beneficial for an FI engine - YES definitely. It is simple - the exhaust flow dynamics are greatly improved over stock and will let your engine breathe much better. As a result it is good for both NA and FI engines.
Lexus Champion
Joined: Feb 2001
Posts: 3,124
Likes: 32
From: Texas
The biggest problem with the installation is removing the stock manifolds. The passenger side does not look to be a problem. The drivers side is another story. I do not expect to remove the engine. I do expect to support the engine and remove the motor mounts and other items like the steering rack for access.
We will know much more very soon as the first set of headers is shipping today and will be ariving early next week. Depending on shop time and scheduling they could go in as early as next weekend. Installation will be on a 1999 GS400.
Regarding supercharged or nitrous engines. YES. Headers will deliver more improvement than on a lower output engine. This is because the extra power comes from extra displacement via a compressor or liquid gas. This extra displacement means there is a higher demand on the exhaust system to get rid of the extra exhaust flow. Conversely, without improving the exhaust system your FI application will not deliver the power it should. It will also cause more heat to be transfered to your heads and valves. For me headers (improved system flow) are a requirement when going FI.
We will know much more very soon as the first set of headers is shipping today and will be ariving early next week. Depending on shop time and scheduling they could go in as early as next weekend. Installation will be on a 1999 GS400.
Regarding supercharged or nitrous engines. YES. Headers will deliver more improvement than on a lower output engine. This is because the extra power comes from extra displacement via a compressor or liquid gas. This extra displacement means there is a higher demand on the exhaust system to get rid of the extra exhaust flow. Conversely, without improving the exhaust system your FI application will not deliver the power it should. It will also cause more heat to be transfered to your heads and valves. For me headers (improved system flow) are a requirement when going FI.
Is anyone in Houston avalable this weekend to test fit Y-pipes accross the different Lexus models. The prototype JB Y-pipe is complete, but is designed for a GS400, so we need to see if the OEM GS400 Y-pipe will fit on a LS430/GS430/SC430.
John Brady and I will be meeting for an hour or so Saturday morning on the southwest/sugar land side of town to do some comparisons. The process should be fairly painless and we'll have access to a lift and air tools. I'll be bringing a SC430 and would like to see if any members can confirm a LS430 or GS430 to the shop on that day.
Please Pm me if you can help out, it will also give you a chance to speak with John Brady on the header subject in detail.
John Brady and I will be meeting for an hour or so Saturday morning on the southwest/sugar land side of town to do some comparisons. The process should be fairly painless and we'll have access to a lift and air tools. I'll be bringing a SC430 and would like to see if any members can confirm a LS430 or GS430 to the shop on that day.
Please Pm me if you can help out, it will also give you a chance to speak with John Brady on the header subject in detail.
Southwest/Sugar Land?
No joke?
I can't bring the LS430, but if it's near my house (oh please oh please make it near New Territory) I'll come and watch and take thousands of pictures!
No joke?
I can't bring the LS430, but if it's near my house (oh please oh please make it near New Territory) I'll come and watch and take thousands of pictures!
Lead Lap
Joined: Nov 2004
Posts: 441
Likes: 0
From: Alberta
Originally Posted by jbrady
The biggest problem with the installation is removing the stock manifolds. The passenger side does not look to be a problem. The drivers side is another story. I do not expect to remove the engine. I do expect to support the engine and remove the motor mounts and other items like the steering rack for access.
We will know much more very soon as the first set of headers is shipping today and will be ariving early next week. Depending on shop time and scheduling they could go in as early as next weekend. Installation will be on a 1999 GS400.
Regarding supercharged or nitrous engines. YES. Headers will deliver more improvement than on a lower output engine. This is because the extra power comes from extra displacement via a compressor or liquid gas. This extra displacement means there is a higher demand on the exhaust system to get rid of the extra exhaust flow. Conversely, without improving the exhaust system your FI application will not deliver the power it should. It will also cause more heat to be transfered to your heads and valves. For me headers (improved system flow) are a requirement when going FI.
We will know much more very soon as the first set of headers is shipping today and will be ariving early next week. Depending on shop time and scheduling they could go in as early as next weekend. Installation will be on a 1999 GS400.
Regarding supercharged or nitrous engines. YES. Headers will deliver more improvement than on a lower output engine. This is because the extra power comes from extra displacement via a compressor or liquid gas. This extra displacement means there is a higher demand on the exhaust system to get rid of the extra exhaust flow. Conversely, without improving the exhaust system your FI application will not deliver the power it should. It will also cause more heat to be transfered to your heads and valves. For me headers (improved system flow) are a requirement when going FI.
Hotter head=extra wear and tear on our expensive engines and less power too.
I'm excited over the headers being ready soon.
Driver
Joined: May 2005
Posts: 132
Likes: 0
From: Texas
Originally Posted by gawd
Is anyone in Houston avalable this weekend to test fit Y-pipes accross the different Lexus models. The prototype JB Y-pipe is complete, but is designed for a GS400, so we need to see if the OEM GS400 Y-pipe will fit on a LS430/GS430/SC430.
John Brady and I will be meeting for an hour or so Saturday morning on the southwest/sugar land side of town to do some comparisons. The process should be fairly painless and we'll have access to a lift and air tools. I'll be bringing a SC430 and would like to see if any members can confirm a LS430 or GS430 to the shop on that day.
Please Pm me if you can help out, it will also give you a chance to speak with John Brady on the header subject in detail.
John Brady and I will be meeting for an hour or so Saturday morning on the southwest/sugar land side of town to do some comparisons. The process should be fairly painless and we'll have access to a lift and air tools. I'll be bringing a SC430 and would like to see if any members can confirm a LS430 or GS430 to the shop on that day.
Please Pm me if you can help out, it will also give you a chance to speak with John Brady on the header subject in detail.
Guys I feel really bad not being able to make it this weekend. I have been soooo busy at work and I finally get a chance to escape Houston for the weekend. John please do not remove me from the list.
Originally Posted by TXGS
Guys I feel really bad not being able to make it this weekend. I have been soooo busy at work and I finally get a chance to escape Houston for the weekend. John please do not remove me from the list.
The weather is just perfect for tubing in New Braunsfels, I'm jealous. Hope you have a good time this weekend. If anyone else is interested, please let me know.
Lead Lap
Joined: Mar 2005
Posts: 796
Likes: 1
From: N.Y.
Headers !!!
So when can we look for more info on the Y-pipe for the 430's ??? Maybe we can arrange something when your in NY, let us know, thanks, i'm sure there are a few 430 owners who will be able to help with this ....
My Precious
Got the headers in today and they look very nice, the jet coating makes the entire header ( inside and out) very,very smooth. I gotta say that the quality looks very nice and the workmanship is very good as well. Price was 598.99 + 14.50 shipping/handling.
I spoke with the fabricator when placing the order late last week, very professional and talkative guy(the guy has been making headers for almost 4 decades
) He suggested that the left motor mount with have to be removed to get adequate access to the driver's side manifold. I'll guess we'll find out in the next few days, I'll post the pics of the install afterwards. Until then, Check out the pics 
I spoke with the fabricator when placing the order late last week, very professional and talkative guy(the guy has been making headers for almost 4 decades
) He suggested that the left motor mount with have to be removed to get adequate access to the driver's side manifold. I'll guess we'll find out in the next few days, I'll post the pics of the install afterwards. Until then, Check out the pics
Last edited by gawd; Jul 19, 2005 at 08:00 AM.