Painless Performance 1999-2006 GM Gen III 4.8, 5.3 & 6.0L Harness Std. Length Ford Racing Vacuum advance and boost retard

Vacuum advance and boost retard is selectable through a MAP sensor

1" or 2" Front Drop / 3" Rear Drop without Shocks

Great street/strip cam

Hyper-Flex System

This creates a downsized package for an easier fit in tight engine compartments

Painless Performance 1999-2006 GM Gen III 4.8, 5.3 & 6.0L Harness Std. Length Ford Racing Vacuum advance and boost retard1999 2006 GM Gen III 4. 8 5. 3 6. 0L EFI Harness Mechanical TB This harness is designed for the 1999 2006 4. 8L, 5. 3L, 6. 0L mechanical throttle body engines using an LS1 LS6 PCM with a 4L60E, 4L65E, 4L70E, 4L80E, 4L85E, or manual transmission. 2003 2006 Engines will require a mechanical throttle body to be installed. 2003 2006 engines which were originally flex fuel will also require Delphi Multec 2 (factory truck style) injectors to be installed.