Straight Cut and Diamond Ground to DIN5/6 standard for maximum efficiency and even load distribution across the gear teeth. Constant mesh dog engagement for shifts as quick as 40 milliseconds. Probably the worlds quietest straight cut geared, sequentially shifted, dog engaged gearbox, with almost none of the whine traditionally associated with this industry race standard. You’ll be amazed how quiet this gearbox is (as in totally streetable) and just how cool it runs.



Internal Splash






  • GM               26 tooth spline
  • GM/Nissan   26 tooth spline with Nissan spigot
  • Mazda          23 tooth spline
  • Nissan          24 tooth spline
  • Toyota          21 tooth spline (R154)
  • Toyota          14 tooth spline (V160 / V161/ 6MT)

Others possible on request



38.5kg or 85lb



440mm Long

180mm Wide

277mm Tall



Choose one column

1st  2.60 2.60 2.44 2.16

2nd 1.88 1.80 1.80 1.80   

3rd  1.52 1.42 1.52 1.52

4th  1:28 1.18 1.28 1.28

5th  1:13  1:1  1.13 1.13

6th   1:1  0.88  1:1   1:1 

Rev 2.94 on all  


Outlet and Inlet for lines to the oil pump, oil filter and oil cooler options


Oil Temperature sensor

Oil Fill

Oil Drain with a magnetic plug



1000 nm / 738 ftlb / 102kg and 11,000 RPM



GM Muncie



Flange pre-drilled for 1350 series Yoke or 1350 series Slip Yoke – supplied with hardware. Comes pre-fitted with a reluctor wheel ready to accept our Speed Sensor to enable launch control, traction control, speed referenced boost or a digital speedometer.



HGT Billet CNC Shift Levers with remote mount bases. Centre of Tunnel or Right Offset shift lever positions. Two different height options to accommodate driver preference. The reverse is integrated into the lever or can be remotely mounted for Paddle Shift setups 

HGT Shift Cut Knob

HGT Billet Brackets for Motec & Geartronics Paddleshift actuators

HGT Billet CNC Digital Gear Position Display

HGT Billet Clutch Release Bearing with Shims

HGT Billet Speed Sensor Bracket and GT101 Sensor

HGT Breather Kit

1350 Series Slip Yoke - bolts up to output flange and welds to the driveshaft, OR 1350 Series Yoke for two-piece driveshafts

Cast or Billet CNC Custom Bell Houses to allow direct bolt up of HGT Gearboxes to:

BMW: Straight 6 M50, V8 M60, M62, S62, S65, V10 S85

GM LS/SBC: OEM setup with 168 tooth ring gear, front mount starter motor 11”/12” clutch OR Race setup with a cover mounted 110 tooth ring gear, rear mount starter motor and 5.5"/7.25" clutch 

Ford: Windsor, Coyote, Alluminator, Barra

Honda - K Series in RWD, F20C S2000

Mazda:  Series 6 Rotary with rear mounted starter

Mitsubishi: EVO 1/2/3 in RWD 

Nissan: SR20, RB20, RB25, RB26, RB30, VQ35, VR38, L Series

Toyota: 1JZ, 2JZ, 1UZ, 3UZ, 3SGE Beams, 86

Other Bell Houses available on request...just ask.

Others available on request