| Pump Timing Wrench | quadstartuning.com | 42 USD | 64 USD | −34.4% |
| Injection pump gasket set | quadstartuning.com | 30 USD | 42 USD | −28.6% |
| Copper Injector Washer Gasket Set | quadstartuning.com | 6 USD | 8 USD | −25% |
| Quadstar Flex Fit Hat | quadstartuning.com | 23 USD | 27 USD | −14.8% |
| Quadstar Snapback Hat | quadstartuning.com | 23 USD | 27 USD | −14.8% |
| PMD Calibration Resistor | quadstartuning.com | 13 USD | 15 USD | −13.3% |
| Fluidampr and Big Ass Balancer Bolt Kit | quadstartuning.com | 420 USD | 476 USD | −11.8% |
| 6.5L High Flow Water Pump | quadstartuning.com | 199 USD | 218 USD | −8.7% |
| P400 6.5L Connecting Rod for Stock Pistons | quadstartuning.com | 162 USD | 177 USD | −8.5% |
| 6.5L 2/0 Battery Cable Upgrade Kit | quadstartuning.com | 169 USD | 180 USD | −6.1% |
| 6.5L DB2 Throttle Cable | quadstartuning.com | 92 USD | 98 USD | −6.1% |
| 6.5L P400 Forged Rotating Assembly | quadstartuning.com | 3486 USD | 3,598 USD | −3.1% |
| THE BEAST DS4 Injection Pump | quadstartuning.com | 1987 USD | — | — |
| 6.2/6.5 Diesel 6L80E/6L90E 6 Speed Conversion Kit | quadstartuning.com | 1987 USD | 0 USD | — |
| Turbo Downpipe Adapter | quadstartuning.com | 1491 USD | — | — |
| 6.5L Performance Piston Kit | quadstartuning.com | 1125 USD | — | — |
| Remanufactured DS4 Injection Pump - With ULSD Upgrade | quadstartuning.com | 1106 USD | — | — |
| Super 60 Turbocharger | quadstartuning.com | 900 USD | — | — |
| Fabricated 6.5L P400 Oil Pan | quadstartuning.com | 862 USD | — | — |
| Super 54 Turbocharger | quadstartuning.com | 825 USD | — | — |
| 6.5L DB2-4911 Injection Pump | quadstartuning.com | 731 USD | — | — |
| 6.5L DB2-4911 250HP Injection Pump | quadstartuning.com | 731 USD | — | — |
| Bosch Marine Fuel Injectors | quadstartuning.com | 599.99 USD | — | — |
| 6.5L Billet 4L80E Torque Converter | quadstartuning.com | 525 USD | — | — |
| 6.5L Standalone Engine Harness | quadstartuning.com | 524 USD | — | — |
| 6.5L OBDI Multi-Position Tuner for 1994-1995 | quadstartuning.com | 450 USD | — | — |
| Piston Machining Service | quadstartuning.com | 375 USD | — | — |
| 6.5L Multi Position Tuner Chip | quadstartuning.com | 375 USD | — | — |
| 6.5L OBDII Single Tune for 1996+ | quadstartuning.com | 350 USD | — | — |
| 6.5L OBDI Single Tune for 1994-95 | quadstartuning.com | 350 USD | — | — |
| 6.5L 4 Inch Exhaust Kit | quadstartuning.com | 308 USD | — | — |
| 6.5L H1 Hummer Starter Kit | quadstartuning.com | 300 USD | — | — |
| OBDII PCM Core Fee - Include Return Label (USA 48 ONLY) | quadstartuning.com | 263 USD | — | — |
| 6.5L Holset Turbocharger Install Kit | quadstartuning.com | 252 USD | — | — |
| 6.2L Long Body Fine Thread Fuel Injectors | quadstartuning.com | 244 USD | — | — |
| Lower Intake Core Fee | quadstartuning.com | 225 USD | — | — |
| Engine Wiring Harness | quadstartuning.com | 214.27 USD | — | — |
| Credit Card Fees | quadstartuning.com | 207 USD | — | — |
| Lightweight Billet Crankshaft Pulley | quadstartuning.com | 184 USD | — | — |
| Refundable Pump Core Fee + Return Label (USA 48 ONLY) | quadstartuning.com | 169 USD | — | — |