MSD Three Step Module Selector 8737 1997-gmc-k2500-suburban-esi6025141 Dyno-Proven Gains up to +22

Dyno-Proven Gains up to +22 HP and +25 Lbs

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State-of-the art measuring method ensures 3D MAXpider mats are custom fit to your vehicle

Finishing off this exhaust is a 4 IN diameter polished tip

4 Liter RE4R01A

MSD Three Step Module Selector 8737 1997-gmc-k2500-suburban-esi6025141 Dyno-Proven Gains up to +22The Module Selectors can also be used with an MSD Timing Control. By plugging the Selector into a retard module socket, you can activate different retard amounts at select times. This is a great feature for engines being upgraded to a multi stage nitrous system. With the addition of an RPM Activated Switch, you can use the Two Step to activate a shift light at different rpm. The Module Selectors must be used with an MSD Soft Touch Rev Control or a