**DISCLAIMER - I am starting this thread to both inquire, and document information regarding removal of non-essential items on the LS. The goal is to provide known and useful information. If you do not agree with modifying an LS to this extent, please refrain from the contribution of your subjective opinion, I would like to keep this as factual as possible. Thanks!** Since the LS's aftermarket support and power train upgrades are rather limited, I have thought about stripping weight from the car to help improve performance instead. As my '06 LS nears the end of it's daily driver usage, I have dreamed of it becoming more of a track car, weekend warrior, and all around driver's car, which means I am willing to sacrifice some creature comforts in order to both reduce weight and simplify the operation and diagnostic procedures for the car. I would like to gather some knowledge from anyone who: A) Has removed these parts already, and what they changed or altered to achieve their results. B) Has had this part break, and is otherwise driving the car without the part functioning. This may provide an idea of how the various systems function with one another and what tweaks will be needed to remove these systems, as to not interrupt functions of what remains. C) Has experience with weight-reduction on other vehicles, and can provide insight or methods of correct procedures. Items/Systems that can be removed, and some general thoughts on each are as follows: 1) A/C System : (Compressor, Lines, condenser, wiring) - The belt routing would most likely not support a shorter belt due to the tensioner position, so a bracket and pulley would be needed. (Mustang kits available, or custom. Does the LS share a pulley/compressor with anything in the modular V8 family?. How does jaguar approach their race engine accessory belt routing. - The PCM and other modules may communicate signals that are crucial to the car's other functions. (DATC, ABS, Fan operation) 2) Hydraulic P/S system (Pump, lines, cooler, reservoir, VAPS, and wiring) - Communication between modules may present errors with advancetac/abs, and ecu. - Electric assist, custom R&P, column mounted motors, or manual conversion parts needed to safely operate steering. - Belt routing, or new "dead" pulley would be added to maintain original routing/belt size. - Benefits would be less drag on motor, less leak-prone lines, and user control of steering assist (if converted to electrical). Less weight, and better gas mpg as well. A cleaner and easy-to-access engine bay would also result. 3) DCCV - The dreaded dual-temp valve in the engine bay. My wife is always one of two temperatures anyway: too cold or too hot, so why do we even bother with this thing?!? - Can the DCCV be removed and replaced with a Y fitting? Allowing for a reduction of coolant routing to the heater core, and simplified operation? - Along with this, what kind of simplified coolant hose routing could be applied to this car? 4) Emissions - (EGR, EVAP, catalytic converters) - I am currently working with Tori (SCT) on a EGR delete file. I have received the file but have yet to flash. He has mentioned he can delete the entire subsystem from the ECU, which should mitigate any non-WOT running issues that are otherwise tuned for with the EGR in place. - Cats have been discussed before, check your local laws on this one. But they are "heavy" and could contribute to some weight loss. - EVAP: Not sure if this can be removed and vented to atmosphere, it would also have to be "coded" out of the ECU to prevent both a CEL and poor running conditions if the car is looking for the addition of the vapors. 5) Audio: Navigation, Amp, speakers, wiring. - This one is probably easy to remove and live without, but For anyone who was cycled the key with these things missing - any adverse effects? - This will account for substantial weight savings. My last car was over 60lbs and it wasn't that great of a sound-system. 6) SRS/Airbags - Steering wheel and passenger compartment SRS systems should only be removed if other equipment is replacing it. Such as: hanresses, roll-cage, etc. For those who have taken their LS this far (steering wheel swaps, seat removals, OLOA LS?) I would like to know what actions were taken to address these systems. 7) Sunroof : Motor, Glass, track and wiring - taking away weight from the top of the car is the best area to do so. Plugs can be made of metal, carbon fiber, composites, etc. 8) Lightweight battery - The LS utilizes a HUGE battery. With other various components removed the demand may be less severe, allowing the use for a racing battery. - Weight distribution is critical to the LS handling characteristics, and must not be neglected during any of this weight reduction, this includes the rear mounted battery. - With interior mounting, a conventional battery cannot be used due to venting. - The LS electrical system is picky with voltage. A reliable and suitable battery should be used. 9) Seats - Rear seats are simple - front seats are heavy, and contain a lot of electrical components. This is an easy place to save weight, and race seats help the driver factor by allowing less body shift during cornering. 10) Electronic E-brake - I will running the mark8 diff in my car, which requires a mounting bracket for the oem motor to be removed. - What type of resistor will need to be put in place to "fool" the car into thinking this motor exists to prevent any codes, failed tests, or warning chimes? - Perhaps the gen2 can be converted to a gen 1 manual/cable system. 11) Other: These are all small things that contribute to weight and could also be removed simply, and without much fuss from the other systems. - Washer fluid reservoir, lines, and wiring. - Hood release sensor (already deleted this, it is a simple momentary switch type sensor) - Rear power window motors/regulators. - Non-structural door panel bracing, and various brackets for previously deleted items - Sound deadening, insulation, and carpet - Automatic pedal adjustment motors/mechanisms - Telescoping steering wheel motor/components. - Backup sensors/module - OEM Horns and associated wiring - Light weight engine cooling fans As you can see, there is a lot that goes into an LS, and therefore - a lot that come out to help the diet. While I have some general ideas of the challenges that lie ahead for me, I would love to get some thoughts going on how to effectively removed and adapt this car for more performance oriented driving, as well as improve the car by getting rid of some problematic parts at the same time. After all, some of the stock stuff isn't available anymore anyway. If we can figure out how to bypass these items and keep our cars on the road, even better. I will update this with anything I find out as I go along, including the actual weight savings from removal. Thanks to all who contribute and again, you don't have to agree with this type of modification to a car like the LS. I am well aware that "better" cars exist for this type of project, and that the "L" stands for luxury. If I didn't know what I wanted out of the car, I would be asking for that. Happy modding!