Updated to include STL and image of cleaner version with rounded edges.
Added STL with Toyota Logo Cutout
Image 1: Original (HKS-TurboTimerX-7-v1.3_1.stl)
Image 2: Rounded (HKS-TurboTimerX-7-v2.1.stl)

Had a friend (7ac0) model this up for my Turbo Timer: HKS Turbo Time X 7th Model so I could mount it nicely in my 1997 Toyota Caldina GTT
Will fit other vehicles (if you find the right space) and may even fit similar Turbo Timers.

I have included pictures of the full model dimensions (ignore the scale percentage), The model and my (very crude) dimensions of the turbo timer itself for reference.

Slicer: Ultimaker Cura 5.6.0
Printer: Creality Ender3 v3 SE (Single Blower Mod)
Filament: Creality PETG
Nozzle: 0.4mm
Print Time: Approx 6.5hrs

-Quality-
Quality/Layer Height: Superior 0.12mm

-Walls-
Wall Thickness: 1.6mm
Wall Line Count: 4
Horizontal Expansion: 0mm

-Top/Bottom-
Top/Bottom Thickness: 0.84mm
Top Layers: 0
Bottom Layers: 999999

-Infill-
Infill: 100% (Grid)

-Temperatures-
Printing Temp: 245C
Build Plate Temp: 75C

-Print Speed-
Print Speed: 90mm/s

-Travel-
Enable Retraction: Yes
Enable ZHop: Yes

-Cooling-
Print Cooling: OFF

-Support-
Support Structure: Normal
Support Placement: Touching Buildplate
Overhang Angle: 60.0
Support Horizontal Expansion: 0.8mm

-Build Plate Adhesion-
Adhesion Type: Brim

((Uploaded with permission from 7ac0 https://www.thingiverse.com/7ac0/designs))