Lexus GX460 Secondary Air Intake Pump mod = "The Uni-Mod" Posted by Mark Hawley on Mar 6th 2018 Lexus GX460 Secondary Air Intake Pump mod: "The Uni-Mod"This is by far the best Sub $20 mod you can do to your Lexus GX460. The Lexus GX460 has a secondary air intake with a tiny foam filter ins … read more