SCS Professional Series Quick Change Gear Set - 6 Spline - Set 68 - 4.11 Ratio 2.94 / 5.75 - 4.33 Ratio 3.09 / 6.06 HALCL19XXL INSTALLATION NOTE: Recommended intake gasket:

INSTALLATION NOTE: Recommended intake gasket: Edelbrock #7217 or Fel-Pro #1206 for #2901

5th Gen (2010-Current

changing times is easier and faster

1978-1981 Mercury Zephyr

Utilizing the same components as our Professional Wheel-E-Bars(TM) we were able to adapt them for street use by replacing the weld-in mounting brackets with bolt-on brackets

SCS Professional Series Quick Change Gear Set - 6 Spline - Set 68 - 4.11 Ratio 2.94 / 5.75 - 4.33 Ratio 3.09 / 6.06 HALCL19XXL INSTALLATION NOTE: Recommended intake gasket:Manufactured from 9310 aircraft alloy for maximum strength, 6 spline quick change gears are crown hobbed, broached for 6 spline shaft fit, and black oxide finished for corrosion protection. Gears undergo a five step heat treating process to deliver maximum durability. Since 1979, SCS Gearbox, Inc. has been listening to it's customers! When SCS Gearbox first started manufacturing, it was to meet the needs of tractor pullers to provide specialized