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Hybrid TechnologyUnique topics related to the GS450H model hybrid drivetrain and other features/options found only on the GS450H. Please use the main 3GS forum for discussion about shared components with other third generation GS models.
I think the intake pipe with the stock box is what most have had success with. This is what JoeZ sells for a few other models. Basically the same thing as the F-Sport pipe. I would think the GS350 or IS350 F-Sport pipe would match up to your car. Get Sewell to send you one to "test" out and see what it does.