Exhaust and headers
10-28-13, 06:08 AM
#2
You would probably need to have them custom made as there are no commercially available headers. Now for an exhaust, that can be anything you want. You can do a true straight pipe or have an x-pipe after the catalytic converter and then have that go to dual mufflers. Here is the somewhat official LS400 muffler thread.
Last edited by Sc0pe; 10-28-13 at 06:12 AM.
10-28-13, 06:22 AM
#3
Lexus Champion
I know that this is not what you want to hear, but I have learned the hard way on Toyotas/Lexus's - your exhaust manifold and catalytic converters are build with amazing engineering and performance and fit and finish - any mod you do to them, unless this is strictly a mod for racing on a closed track, will end up being a downgrade, not an upgrade. - especially when gas mileage and making the car sound like a cheap hot rod are taken into consideration. - It's like all you end up with is crappy fit, worse mileage, a lot of noisiness that isn't the good kind, and no significant increase in performance.
Besides, a lot of additional custom engine work would have to be done to derive any real advantage to an exhaust mod, and I doubt you are ready to install a supercharger, etc. - if you want a V8 to hop, I'd look into a Camaro, LS400 isn't really designed for that.
If you gave me the best aftermarket headers and catalytic converters for an LS400 for free, I'd give them back!
If you want a performance upgrade, do Yamae's ripple test and if you have significant ripple, replace your ECU capacitors for better low-end torque!
Besides, a lot of additional custom engine work would have to be done to derive any real advantage to an exhaust mod, and I doubt you are ready to install a supercharger, etc. - if you want a V8 to hop, I'd look into a Camaro, LS400 isn't really designed for that.
If you gave me the best aftermarket headers and catalytic converters for an LS400 for free, I'd give them back!
If you want a performance upgrade, do Yamae's ripple test and if you have significant ripple, replace your ECU capacitors for better low-end torque!
Last edited by LScowboyLS; 10-28-13 at 06:29 AM.
10-28-13, 11:17 PM
#4
PPE Engineering (http://ppeengineering.com/) makes and sells some well designed 1uz headers and (though they don't list them on the site) have a jig set up for the '98-00 LS400.
I know that this is not what you want to hear, but I have learned the hard way on Toyotas/Lexus's - your exhaust manifold and catalytic converters are build with amazing engineering and performance and fit and finish - any mod you do to them, unless this is strictly a mod for racing on a closed track, will end up being a downgrade, not an upgrade. - especially when gas mileage and making the car sound like a cheap hot rod are taken into consideration. - It's like all you end up with is crappy fit, worse mileage, a lot of noisiness that isn't the good kind, and no significant increase in performance.
Besides, a lot of additional custom engine work would have to be done to derive any real advantage to an exhaust mod, and I doubt you are ready to install a supercharger, etc. - if you want a V8 to hop, I'd look into a Camaro, LS400 isn't really designed for that.
If you gave me the best aftermarket headers and catalytic converters for an LS400 for free, I'd give them back!
If you want a performance upgrade, do Yamae's ripple test and if you have significant ripple, replace your ECU capacitors for better low-end torque!
Besides, a lot of additional custom engine work would have to be done to derive any real advantage to an exhaust mod, and I doubt you are ready to install a supercharger, etc. - if you want a V8 to hop, I'd look into a Camaro, LS400 isn't really designed for that.
If you gave me the best aftermarket headers and catalytic converters for an LS400 for free, I'd give them back!
If you want a performance upgrade, do Yamae's ripple test and if you have significant ripple, replace your ECU capacitors for better low-end torque!
The LS400 is designed to be a car. A car will be whatever a dedicated owner wants it to be. It will do whatever they want it to do.
If you really want to discuss pros/cons then PM me, this isn't the place.
10-29-13, 07:55 AM
#5
You would probably need to have them custom made as there are no commercially available headers. Now for an exhaust, that can be anything you want. You can do a true straight pipe or have an x-pipe after the catalytic converter and then have that go to dual mufflers. Here is the somewhat official LS400 muffler thread.
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