Our LS1 to LS2 throttle body adapter harness allows the use of the silver blade 90mm LS2 throttle body on a Drive By Wire LS1 application. This is a Plug and Play harness, so installation takes just minutes and is completely hassle free! Will not work with 2001-2007 VORTEC truck and SUV applications! Does not work with Throttlebodies with a Gold Blade