Magnus Launch Control Device



Everybody who has been racing long enough knows that dropping the clutch is a sure way to be picking up a whole lot of parts at the starting line, not to mention making you inconsistent as a drag racer.

The Launch Control Device also known as a “clutch slipper valve” was originally developed by 9sec9 and after seeing its success, we decided to give it a try in our race car. We were extremely impressed with how well it worked! What the device did was relieve all the effort that was needed to properly slip the clutch. This allowed us to be a lot more consistent and make it through a number of events in one piece. The adjustability in the Device allowed us to adjust the amount of slip needed as conditions changed based on track and weather. This kept us consistent and more focused on driving the race car.

The built in line lock is used only when launching the car. It is bypassed when you are off the 2-step button so there is no clutch slippage between gear changes.

Installation tips

A mighty vac must be used in order to bleed the device correctly. Bleed the LCD with the switch on and with the switch off multiple times until device it is free of air and functioning like a normal clutch when not energized. Should only be activated through first gear. Can be ecu controlled with a standalone ecu or through a micros witch on first gear. Should not be on through 2nd gear. 

Our recommended clutch lines comes in 24.75″, 36″ and 48″s to make connecting your Master Cylinder to Slave Cylinder seamless.

Here are some videos demonstrating how the Device works:


  • Consistent Launches
  • Will drop 60ft times
  • Adjustable Slip
  • Helps save drive line parts
  • Works on any stick shift vehicle (AWD, RWD, FWD)

***  Also known as Slipper Valve or Clutch Slipper


Part # 

  • MMCDRV9004     Magnus Launch Control Device
  • MMCDRV9004S   Magnus Launch Control Device Pro for Cars with Concentric Slave Cylinder (finer adjustment)


Additional information

Weight 3 lbs
Dimensions 12 × 4 × 4 in
Choose Device

Standard Device, Pro Device, Nil

Add-On 24.75" Line

Nil, 24.75" Line

Add-On 36" Line

Nil, 36" Line

Add-On 48" Line

Nil, 48" Line

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