The Vapid Dominator GTT from the Los Santos Tuners update with ALL tuning parts included and fully usable, along with a moving & tunable steering wheel and all liveries.
I've included the .max project file for anyone who wants to make their own fully tunable car.

The car is FULLY stable with 165 tuning parts, it can be shot, spawned 10+ times, thrown into dynamic objects or blown up without the game crashing.

PUT DOMINATOR8.DAT INTO THE "carmods" FOLDER! (if it doesn't exist, create a folder called "carmods" in your game folder and put the .dat there)
CAR REQUIRES THIS TRAINER 21.09.26.1 AND UP TO WORK PROPERLY https://gtaforums.com/topic/896795-1000-1080-zolika1351s-trainermod-menu-rewritten/

Use https://gtaforums.com/topic/955449-iv-zolikapatch/ to make the steering wheel move

Note that because of the high amount of tuning parts, this car might cause performance issues on low-end systems.

Vehicles.ide:
dominator8, dominator8, car, SABREGT, SABREGT, VEH@LOW, NULL, 1, 0, 0.2240, 0.2240, 0, 5, 1.0 ,0, wheelangle:-17.927+livery
txdp
vehshareV, vehshare
race_interior, vehshareV
race_generic, race_interior
dominator8, race_generic

Carcols.dat (car4):
dominator8, 0,0,49, 38,38,85, 0,97,102, 3,0,12, 6,6,4, 11,4,12, 13,13,12, 16,95,90, 24,1,12, 21,21,12, 23,23,2, 31,31,27, 32,113,34, 34,12,34, 49,13,41, 52,0,59, 62,13,69, 76,4,76, 82,85,76, 87,8,76, 89,0,4, 92,95,90, 95,95,2, 106,103,2,

Tuning part count: 165
Tuning part list:
Polished Strut Brace
Carbon Strut Brace
Medium Polished Strut Brace
Medium Titanium Strut Brace
Titanium Strut Brace
Triangulated Strut Brace
Wide Titanium Strut Brace
Large Polished Strut Brace
Stickerbomb Strut Brace
Polished Twin Bar Strut Brace
Extreme Billet Strut Brace
Lightened Racing Strut Brace
Sports Seats
Painted Sports Seats
Carbon Sports Seats
Ballistic Fiber Sports Seats
Painted Tuner Seats
Carbon Tuner Seats
Ballistic Fiber Tuner Seats
Painted Bucket Seats
Carbon Bucket Seats
Ballistic Fiber Bucket Seats
Painted Track Seats
Carbon Track Seats
Ballistic Fiber Track Seats
Carbon Race Seats
Stock Front Bumper
Primary Front Bumper
Secondary Front Bumper
Stock Rear Bumper
Primary Rear Bumper
Secondary Rear Bumper
Smooth Rear Bumper
Primary Smooth Rear Bumper
Secondary Smooth Rear Bumper
No Roll Cage
Street Half Cage
Dash Dodger Cage
Padded Dash Dodger Cage
Full Roll Cage
Padded Full Roll Cage
Chrome Hood Catches
Angled Hood Catches
Straight Hood Catches
Race Hood Pins
Drag Hood Pins
Primary Valve Covers
Secondary Valve Covers
Chrome Valve Covers
Primary Ribbed Valve Covers
Secondary Ribbed Valve Covers
Chrome Ribbed Valve Covers
Stock Exhaust
Chrome Tip Exhaust
Big Bore Exhaust
Straight Pipe Exhaust
Race Exhaust
Hotring Exhaust
Titanium Hotring Exhaust
Stock Fenders
Primary Overfenders
Secondary Overfenders
Bolted Race Overfenders
Primary Race Overfenders
Secondary Race Overfenders
Red Headlight Tape
Black Headlight Tape
Blue Headlight Tape
Yellow Headlight Tape
Primary Headlight Grille
Secondary Headlight Grille
Primary Headlight Covers
Secondary Headlight Covers
Stock Hood
Primary Stock Hood
Carbon Stock Hood
Primary Vented Hood
Secondary Vented Hood
Carbon Vented Hood
Primary Small Cowl Hood
Secondary Small Cowl Hood
Carbon Small Cowl Hood
Primary Large Cowl Hood
Secondary Large Cowl Hood
Carbon Large Cowl Hood
Primary Drag Hood
Secondary Drag Hood
Carbon Drag Hood
Primary Sabre Turbo Hood
Secondary Sabre Turbo Hood
Carbon Sabre Turbo Hood
Chrome Air Filter
Twin Air Filter
Sweptback Ram Pipes
Vertical Ram Pipes
Plastic Upper Intake Manifold
Prim. 450CUI Intake Manifold
Sec. 450CUI Intake Manifold
Plastic 450CUI Intake Manifold
Primary V8 Air Intake System
Secondary V8 Air Intake System
Chrome V8 Air Intake System
Black Supercharger
Brushed Supercharger
Chrome Supercharger
Stock Intercooler
Exposed Intercooler
Intercooler With Twin Fans
Intercooler With Water Sprayer
No Louvers
Black Plastic Louvers
Primary Louvers
Secondary Louvers
Carbon Louvers
Stock Splitter
Primary Chin Spoiler
Secondary Chin Spoiler
Carbon Chin Spoiler
Primary Race Chin Spoiler
Secondary Race Chin Spoiler
Carbon Race Chin Spoiler
Stock Spoiler
Primary Wing
Secondary Wing
Carbon Wing
Track Wing
Drift Wing
Street SPL Wing
Race Wing
Extreme Performance Wing
Autobahn Racer Wing
Sunstrip
Secondary Sunstrip
Stock Wheel
Apex Basic
Apex Clubman
Apex Professional
Formula Basic
Formula Cutout
Formula Clubman
Forumla Professional
Sprint Basic
Sprint Clubman
Sprint MKII
Sprint Lightweight
Sprint Featherweight
Sprint Professional
Rally Basic
Rally Clubman
Rally Professional
Primary Pillar Vents
Secondary Pillar Vents
Carbon Pillar Vents
Primary Pillar Scoop
Secondary Pillar Scoop
Carbon Pillar Scoop
Chin Spoiler Delete