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Sensor Kits for Holley EFI systems
Drive Shaft Speed - G-Meter - Shock Travel - Pressure

EGT kits Racepak Interface 18 lug reluctors


Holley Shaft Speed Kit

WEB Price

Hall effect sensor, bracket, collar, L bracket, 12' shielded cable, 3 Holley ECU terminals for your P2A plug, and instruction sheet


Kits with 8 magnet collars available below. 8 Mag collars are available in 1.875, 2.125 and 2.187 sizes.

2 Magnet collars are available for 1.5" which is the slip yoke size for Powerglide and TH350 $170 for that kit. Other 2 magnet sizes are shown here.


Kits wihtout collar available below.



If you have an Ford 8.8 you have 4 options:

  1. Get a Mark Williams yoke for 1350 joints and order my kit with 2.187 collar
  2. Get a Strange yoke for 1350 and their collar.
  3. Put collar/sensor on the trans slip yoke
  4. If you have a strange yoke wiht a 2.500 step get the 18 lug reluctor below


8 magnet and 18 lug for better resolution below.


  Holley DS kit with no collar

WEB Price


  Holley DS kit
with 8 magnet collarr

WEB Price


  Replacement HE sensor
with weather-pak connector

WEB Price


  Holley DS kit
with 18 lug collar

more pulses = better resolution. Complete with special sensor.

WEB Price


Split Collars


  Split Collar  - 4 Magnets

NO Sensor

WEB Price

  When ordering choose from the following sizes:

    1.250"         Click here for sizing info
    1.812"   Popular Strange Engineering size
    1.875"   Popular Mark Williams size
    2.125"    Popular Strange Engineering size
    2.187"    Popular Mark Williams size

Yes you can remove any number of magnets. And yes, it's common on 12 bolts, Dana's and 9" Fords with stock yokes to open up the hole to some unusual size/shape.  It's not a crankshaft - if you keep it within .050 of straight/round, your sensor will see the magnet.

Magnets are oriented South side out (required to work on Racepak, MSI and most other hall effect sensors)

Includes 4 magnets and stainless hardware.

L bracket available above $11    

S-37x8   Split Collar  - 8 Magnets

WEB Price

18 lug collars - reluctors

  Billet 18 lug High Def Driveshaft collar/reluctor

Get good wheel speed readings from the hit.

works with Racepak V300SD / Sportsman, most EFI systems and traction control units.

5 sizes: 1.812 1.875 2.125 2.187 2.500

Billet steel .475 thick.

Requres a metal sensing Hall Effect sensor (Racepak MSC3 which is 3/8 threads not 5/16)

2.500 model works with Strange yokes for 8.8, 12 Bolt, Dana

Mase in USA by Motion Raceworks


L bracket available above $11    

S-37x8   Split Collar  - 8 Magnets

WEB Price


  5/16" metal sensing Hall Effect sensor for 18 lug collars and other metal sensing allpications. No connector. 5-19 volt power.

  • Add a Racepak connector $15
  • Add a Weatherpak connector (to mate to my Holley kit) $10
  • Specify in note if above desired


S-364   metal - 5/16

WEB Price


Shaft Collar details and sizing


Measure the size of your pinion yoke

<<<< here to determine grip diameter

Clutch Kit

  Holley Clutch - Input Shaft RPM kit

WEB Price

3/8"-24 Hall effect senosr, 6' shielded cable, Holley ECU pins and instruction sheet. Works with Liberty, G-force, Lenco, Jerico (any candlestick with 3/8"-24 threads. - 5-16" sensor avaialble)

Customer responsibility to have magnet pressed into input shaft with SOUTH side out.

2 magnets add $5




Wiring Supplies

  Holley ECU Connectors

WEB Price

One of the Holley ECU connectors: ONLY the following available:


Specify which in comments.

While supplies last only


  Holley ECU Termainals

WEB Price

30 ECU Terminals


G-meter kit

  Holley G-meter Kit

Contact Hyperactive Performance for 2 axis G-meter


Contact Computech for single axis G-meter




Holley Shock Travel

  Holley 8" Shock Travel Kit

WEB Price

8" travel sensor, weatherpak connectors 12' shielded cable, Holley ECU pins, instructions

This is a kit - you must assemble the weatherpak and make mounts.

  • Body diameter .750"
  • Compressed length (rod end centers) 14 3/4"
  • Extended length (rod end centers) 22 3/4


 shock mount travel pictures

  Holley 4" Shock Travel Kit

WEB Price

4" travel sensor, weatherpak connectors 12' shielded cable, Holley ECU pins, instructions

 This is a kit - you must assemble the weatherpak and make mounts.

  • Body diameter .750"
  • Compressed length (rod end centers) 9 1/2"
  • Extended length (rod end centers) 13 1/2"

shock mount travel pictures


Holley Pressure Sensor kits

  Holley Pressure kits

WEB Price

0-250 PSI for Trans, oil, fuel pessure

4' shielded cable

 Holley ECU pins, instructions

  Holley Pan Vac - Racepak sensor

WEB Price

Pan vac using the Racepak 1/8" sensor - sensor must be remote/soft mounted. 5' cable


  Holley Pressure - Racepak sensor

WEB Price

Pressure using any Racepak pressure sensor (0-15,150,300,500,1500,3000)


specify what range in the check-out note.


EGT kits for Holley Dominator

  Holley 8 Cyl EGT kit - with
G meter

WEB Price

This plug & play kit includes

  • 8 1/4" EGT sensors with
  • Integrated G-meter - a $175 value
  • Holley J3 connector
  • 1/8" NPT Stainless weld bungs
  • Instructions

Adapters available to mate to Racepak weld bungs.

Cable with J4 plug is 36" total length so box must be mounted flat and within 36" of the ECU. Sensor cable lenghts are 6'.


add $40 for Racepak style SS bungs.

Other Holley compatiable EGT kits are available from

Racepak Dash & Interface

Comes with the Holley EFI Interface, the IQ3 and 2 terminator caps and the Holley 558-412 Can harness

Plug-and-Play: I program the dash to display the RPM, Water temp, oil pressure, fuel pressure and volts from the Holley. You can add a Racepak bottle pressure and have it on the dash as well.




IQ3 Display & Holley EFI Interface


    1 lbs