How to get the most bang for your buck while doing tuning orders. Link to spreadsheet with the part’s values calculated.
Other Car Mechanic Simulator 2021 Guides:
- Cheats
- Story Orders
- Car Parts List
- Engine Parts List
- Car List & Locations
- Best Value Tuning Shop Parts
- Default Parts & Locations
- All CMS21 Guides
Best Value Tuning Shop Parts
The best value performance parts are: Air Filters, Carburetors, Exhaust Manifolds, and Ignition parts (excluding the default “Ignition Coil”). For electric cars the Cables are a cheap boost too.
I found this out by creating a chart with all the tuning shop parts cost vs their performance gain.
It calculates each part’s value divided by its percent increase in the “Cost per %” column, lower being better.
You can right click the top of column D and sort sheet A-Z to organize the sheet by value instead of alphabetically if you prefer.
I created this to find out which parts give the most performance for the least cash, so I could be thrifty while doing tuning jobs. Hope it helps!
| Part | Price (CR) | Percent (+HP%) | Cost per % |
| Airfilter | 35 | 1 | 35 |
| Airfilter (I4 B) | 150 | 1.75 | 86 |
| Airfilter (I4 DOHC TAE) | 35 | 1.5 | 23 |
| Airfilter (I6 B) | 90 | 1.5 | 60 |
| Airfilter (I6 L24) | 150 | 1.5 | 100 |
| Airfilter (Type A) | 100 | 1.5 | 67 |
| Airfilter (V8 DOHC CGM) | 30 | 1.5 | 20 |
| Airfilter (V8 OHV F) | 48 | 1.5 | 32 |
| Airfilter (V8 SOHC FME) | 30 | 1.5 | 20 |
| Alternator | 300 | 1.5 | 200 |
| Alternator (I6 B) | 400 | 1.5 | 267 |
| Cable A (eDen-1H) | 150 | 2 | 75 |
| Cable A (Proton e-R) | 150 | 2 | 75 |
| Cable B (eDen-1H) | 150 | 2 | 75 |
| Cable B (Proton e-R) | 150 | 2 | 75 |
| Cable C (eDen-1H) | 150 | 2 | 75 |
| Camshaft | 600 | 3 | 200 |
| Camshaft (I3) | 440 | 2.5 | 176 |
| Camshaft (I4 B) | 500 | 3 | 167 |
| Camshaft (I4 SOHC) | 550 | 2.75 | 200 |
| Camshaft (I6 B) | 360 | 3 | 120 |
| Camshaft (V6 B) | 400 | 1 | 400 |
| Camshaft (V8 OHV C) | 200 | 2.75 | 73 |
| Camshaft (V8 OHV) | 550 | 2.75 | 200 |
| Camshaft (V8) | 660 | 3.3 | 200 |
| Carburetor (4 Barrel) | 375 | 12 | 31 |
| Carburetor (I6 B) | 210 | 3 | 70 |
| Carburetor B (V8 OHV E) | 310 | 6 | 52 |
| Carburetor C (V8 OHV E) | 350 | 5 | 70 |
| Catalytic Converter | 350 | 1.75 | 200 |
| Charger (eDen-1H) | 978 | 3 | 326 |
| Charging Inductor (Proton e-R) | 274 | 0.75 | 365 |
| Charging Rectifier (CHRG-e E1) | 105 | 0.75 | 140 |
| Charging Rectifier (Proton e-R) | 105 | 0.75 | 140 |
| Clutch Plate | 350 | 1.75 | 200 |
| Clutch Pressure Plate | 180 | 0.9 | 200 |
| Converter (CHRG-e E1) | 247 | 0.75 | 329 |
| Converter (Proton e-R) | 267 | 0.75 | 356 |
| Engine Head (I3) | 1700 | 7 | 243 |
| Engine Head (I4 B) | 2500 | 10 | 250 |
| Engine Head (I4 DOHC TAE) | 1800 | 3 | 600 |
| Engine Head (I4 SOHC D) | 1872 | 3 | 624 |
| Engine Head (I4 SOHC) | 1000 | 5 | 200 |
| Engine Head (I4 SR20) | 1973 | 3 | 658 |
| Engine Head (I4) | 1400 | 7 | 200 |
| Engine Head (I5 DOHC ADI) | 1400 | 3 | 467 |
| Engine Head (I6 B) | 1350 | 8 | 169 |
| Engine Head (I6 DOHC BU2 T) | 1841 | 3 | 614 |
| Engine Head (I6 DOHC FMW) | 1800 | 3 | 600 |
| Engine Head (I6 L24) | 1800 | 3 | 600 |
| Engine Head (V8 OHV F) | 1734 | 3 | 578 |
| Engine Head (V8 OHV) | 800 | 9 | 89 |
| Engine Head (V8) | 2000 | 10 | 200 |
| Engine Head A (V6 B) | 1600 | 7 | 229 |
| Engine Head A (V6 DOHC AKY) | 1750 | 3 | 583 |
| Engine Head A (V6 VQ37VHR) | 2077 | 3 | 692 |
| Engine Head A (V8 DOHC CGM) | 1800 | 3 | 600 |
| Engine Head A (V8 SOHC FME) | 1800 | 3 | 600 |
| Engine Head B (I3) | 1900 | 7 | 271 |
| Engine Head B (V6 B) | 1600 | 7 | 229 |
| Engine Head B (V6 DOHC AKY) | 1750 | 3 | 583 |
| Engine Head B (V6 VQ37VHR) | 1800 | 3 | 600 |
| Engine Head B (V8 DOHC CGM) | 1800 | 3 | 600 |
| Engine Head B (V8 SOHC FME) | 1800 | 3 | 600 |
| EV Battery Module | 2121 | 2 | 1061 |
| Exhaust Manifold | 150 | 3 | 50 |
| Exhaust Manifold (I3) | 375 | 3 | 125 |
| Exhaust Manifold (I4 B) | 160 | 4 | 40 |
| Exhaust Manifold (I4 DOHC TAE) | 472 | 4 | 118 |
| Exhaust Manifold (I4 SOHC D) | 351 | 4 | 88 |
| Exhaust Manifold (I4 SOHC) | 170 | 1.5 | 113 |
| Exhaust Manifold (I4 SR20) | 245 | 4 | 61 |
| Exhaust Manifold (I4 TURBO) | 210 | 1.05 | 200 |
| Exhaust Manifold (I5 DOHC ADI) | 247 | 4 | 62 |
| Exhaust Manifold (I6 B) | 80 | 3 | 27 |
| Exhaust Manifold (I6 DOHC BU2 T) | 117 | 4 | 29 |
| Exhaust Manifold (I6 L24) | 348 | 4 | 87 |
| Exhaust Manifold (V6 B) | 180 | 4 | 45 |
| Exhaust Manifold (V8 OHV D) | 350 | 2.5 | 140 |
| Exhaust Manifold (V8 OHV F) | 240 | 4 | 60 |
| Exhaust Manifold (V8 OHV) | 160 | 0.8 | 200 |
| Exhaust Manifold (V8) | 330 | 1.65 | 200 |
| Exhaust Manifold A (BU2) | 173 | 4 | 43 |
| Exhaust Manifold A (I6 DOHC FMW) | 207 | 4 | 52 |
| Exhaust Manifold A (V12) | 240 | 4 | 60 |
| Exhaust Manifold A (V6 DOHC AKY) | 200 | 4 | 50 |
| Exhaust Manifold A (V6 VQ37VHR) | 240 | 4 | 60 |
| Exhaust Manifold A (V8 SOHC FME) | 240 | 4 | 60 |
| Exhaust Manifold B (BU2) | 273 | 4 | 68 |
| Exhaust Manifold B (I6 DOHC FMW) | 207 | 4 | 52 |
| Exhaust Manifold B (V12) | 240 | 4 | 60 |
| Exhaust Pipe | 180 | 0.9 | 200 |
| Exhaust Pipe C | 140 | 1 | 140 |
| Flywheel | 650 | 3.25 | 200 |
| Front Exhaust Pipe (V8 OHV) | 170 | 2 | 85 |
| Front Exhaust Pipe (V8) | 300 | 1.5 | 200 |
| Front Exhaust Pipe B (V8) | 280 | 1.4 | 200 |
| Front Exhaust Section | 180 | 0.9 | 200 |
| Front Exhaust Section (I4 SOHC) | 135 | 1.5 | 90 |
| Front Exhaust Section (I6 B) | 160 | 1 | 160 |
| Front Exhaust Section (TURBO) | 220 | 1.1 | 200 |
| Front Exhaust Section (V8 OHV D) | 180 | 2 | 90 |
| Front Exhaust Section A (I3) | 160 | 2 | 80 |
| Front Exhaust Section A (V6 B) | 160 | 1 | 160 |
| Front Exhaust Section B (I3) | 160 | 2 | 80 |
| Front Exhaust Section B (V6 B) | 160 | 1 | 160 |
| Front Exhaust Section C (V6 B) | 440 | 1 | 440 |
| Front Exhaust Section D (V6 B) | 440 | 1 | 440 |
| Fuel Filter | 90 | 0.6 | 150 |
| Fuel Pump | 300 | 1.5 | 200 |
| Fuel Pump (I6 B) | 200 | 2 | 100 |
| Fuel Rail (I3) | 550 | 3 | 183 |
| Fuel Rail (I4 B) | 360 | 1 | 360 |
| Fuel Rail (I4 DOHC TAE) | 597 | 2 | 299 |
| Fuel Rail (I4 SR20) | 579 | 2 | 290 |
| Fuel Rail (I5 DOHC ADI) | 521 | 2 | 261 |
| Fuel Rail (I6 DOHC BU2 T) | 501 | 2 | 251 |
| Fuel Rail (I6 DOHC FMW) | 381 | 2 | 191 |
| Fuel Rail (V12) | 590 | 2 | 295 |
| Fuel Rail (V6 B) | 400 | 3 | 133 |
| Fuel Rail (V6 DOHC AKY) | 369 | 2 | 185 |
| Fuel Rail (V6 VQ37VHR) | 590 | 2 | 295 |
| Fuel Rail (V8 DOHC CGM) | 607 | 2 | 304 |
| Fuel Rail (V8 SOHC FME) | 590 | 2 | 295 |
| Fuel Rail DI | 950 | 4 | 238 |
| Fuel Rail MPI | 340 | 3 | 113 |
| Glow Plug | 25 | 0.13 | 192 |
| Ignition Coil | 180 | 0.75 | 240 |
| Ignition Coil (I4 SOHC) | 220 | 4.5 | 49 |
| Ignition Coil B | 280 | 4 | 70 |
| Ignition Distributor A | 120 | 5 | 24 |
| Ignition Distributor Cap | 75 | 1.5 | 50 |
| Ignition Distributor Rotor | 60 | 0.5 | 120 |
| Ignition Wires (I4 DOHC TAE) | 190 | 2 | 95 |
| Ignition Wires (I4 SOHC) | 150 | 0.75 | 200 |
| Ignition Wires (I6 B) | 150 | 1.25 | 120 |
| Ignition Wires (I6 L24) | 195 | 2 | 98 |
| Ignition Wires (V8 OHV F) | 205 | 2 | 103 |
| Ignition Wires (V8) | 120 | 1 | 120 |
| Intake Manifold (1 Carb) | 307 | 2 | 154 |
| Intake Manifold (2 Carb) | 550 | 2.75 | 200 |
| Intake Manifold (I3) | 600 | 3 | 200 |
| Intake Manifold (I4 B) | 840 | 3 | 280 |
| Intake Manifold (I6 B) | 300 | 3 | 100 |
| Intake Manifold A (V6 B) | 840 | 2 | 420 |
| Intake Manifold A (V6 VR38DETT) | 530 | 2 | 265 |
| Intake Manifold A (V6 VR38DETT) | 700 | 2 | 350 |
| Intake Manifold B (V6 B) | 400 | 1 | 400 |
| Intake Manifold I4 DI | 600 | 3 | 200 |
| Intake Manifold I4 MPI | 250 | 1.25 | 200 |
| Inverter (CHRG-e E1) | 197 | 1 | 197 |
| Inverter (Proton e-R) | 210 | 1 | 210 |
| Junction Box (CHRG-e E1) | 125 | 1.5 | 83 |
| Link Capacitor (CHRG-e E1) | 173 | 0.75 | 231 |
| Link Capacitor (Proton e-R) | 191 | 0.75 | 255 |
| Middle Muffler | 330 | 1.65 | 200 |
| Piston with Conrod | 225 | 1.13 | 199 |
| Piston with Conrod (V8 OHV C) | 225 | 1.13 | 199 |
| Power Electronics (eDen-1H) | 478 | 2 | 239 |
| Power Electronics Converter (CHRG-e E1) | 590 | 1.65 | 358 |
| Power Electronics Converter (Proton e-R) | 612 | 1 | 612 |
| Power Steering Pump (I4 B) | 300 | 1 | 300 |
| Power Steering Pump (I4) | 250 | 1.25 | 200 |
| Power Steering Pump (I6 B) | 200 | 1.5 | 133 |
| Power Steering Pump (V12) | 300 | 2 | 150 |
| Power Steering Pump (V6 B) | 250 | 2 | 125 |
| Power Steering Pump (V6 DOHC AKY) | 306 | 2 | 153 |
| Power Steering Pump (V8 OHV F) | 250 | 1.5 | 167 |
| Power Steering Pump (V8) | 300 | 1.5 | 200 |
| Rear Muffler | 200 | 1 | 200 |
| Rear Muffler (I4) | 400 | 2 | 200 |
| Rear Muffler (V8) | 700 | 3.5 | 200 |
| Rear Muffler 370Z | 600 | 4 | 150 |
| Rear Muffler A | 500 | 2 | 250 |
| Rear Muffler B (V8) | 800 | 3 | 267 |
| Rear Muffler F | 160 | 2 | 80 |
| Rear Muffler Fairlady Z | 320 | 2 | 160 |
| Rear Muffler GTR | 800 | 5 | 160 |
| Rear Muffler Silvia | 480 | 3 | 160 |
| Round Air Filter (1 Carb) | 80 | 1 | 80 |
| Round Air Filter (2 Carb) | 120 | 1.2 | 100 |
| Spark Plug | 25 | 0.13 | 192 |
| Throttle (BU2) | 305 | 1 | 305 |
| Throttle (I3) | 400 | 2.5 | 160 |
| Throttle (I4 SOHC D) | 460 | 1 | 460 |
| Throttle (I4 SR20) | 467 | 1 | 467 |
| Throttle (I4) | 310 | 3 | 103 |
| Throttle (I5 DOHC ADI) | 306 | 1 | 306 |
| Throttle (I6 DOHC BU2 T) | 343 | 1 | 343 |
| Throttle (I6 DOHC FMW) | 256 | 1 | 256 |
| Throttle (I6 DOHC FMW) | 460 | 1 | 460 |
| Throttle (V12) | 460 | 1 | 460 |
| Throttle (V6 B) | 500 | 2.75 | 182 |
| Throttle (V6 DOHC AKY) | 460 | 1 | 460 |
| Throttle (V6 VQ37VHR) | 507 | 1 | 507 |
| Throttle (V8 DOHC CGM) | 460 | 1 | 460 |
| Throttle (V8) | 330 | 1.65 | 200 |
| Turbo (V6 VR38DETT) | 1500 | 3 | 500 |
| Turbocharger | 1200 | 10 | 120 |
| Turbocharger (I3) | 1100 | 7 | 157 |
| Turbocharger (I4 B) | 1150 | 7 | 164 |
| Turbocharger (I4 SOHC D) | 803 | 3 | 268 |
| Turbocharger (I5 DOHC ADI) | 597 | 3 | 199 |
| Turbocharger (I6 DOHC BU2 T) | 802 | 3 | 267 |
How much does each star add to the tuning ??
Thanks for having the fortitude and infinite patience to document this!