Dodge RAM 2500 / 3500 Full Tuning Guide

Basic Factory Specifications

• PCD: 8×165.1mm (8×6.5")

• Center Bore: 121.3mm

• Wheel Studs: M14×1.5

• Factory Offset: ET30 ~ ET40

• Engine Options

• 6.7L Cummins Turbo Diesel

• 6.4L HEMI V8 Gasoline

1. Engine & Performance Tuning

6.7L Cummins Diesel

• ECU Tuning Stage 1–3

  Increase horsepower +60~180HP, torque +150~300lb-ft; improve throttle response, towing ability and fuel economy.

• Intake & Cooling

  High-flow cold air intake + upgraded intercooler, reduce heat soak for stable power output.

• Exhaust System

  4"–5" turbo-back straight pipe exhaust, deep aggressive diesel sound, better exhaust airflow.

• High-Performance Upgrade

  Upgraded fuel injectors, high-pressure fuel pump, compound turbo kit; easily reach 500HP+ / 1100lb-ft+.

6.4L HEMI V8 Gas

2. Suspension & Lift Tuning

• 2.5–3.5" Leveling Kit

  Level front and rear, fit 35-inch tires; perfect for daily driving and heavy towing.

• 4–6" Full Suspension Lift

  Equipped with Fox / BDS / Rancho coilovers; fit 37-inch tires, improve off-road ground clearance.

• 8–10" Extreme Lift

  Designed for 22×12 / 24×14 / 26×14 / 26×16 large wheel show truck builds.

• Common Upgrades

  Adjustable upper control arms, dual steering stabilizer, heavy-duty leaf springs, bump stops, steel skid plates.

3. Wheels & Tires Tuning Fitment

• 22×12：ET-44 ~ ET-51 | 4"+ Lift | Tire：35×12.5R22 / 37×13.5R22

• 24×14：ET-70 ~ ET-76 | 6"+ Lift | Tire：37×15.5R24 / 40×15.5R24

• 26×14：ET-76 ~ ET-84 | 8"+ Lift | Tire：40×15.5R26

• 26×16：ET-88 ~ ET-96 | 10"+ Lift + Widebody | Tire：40×16R26

4. Exterior Styling

• Custom RAM letter mesh grille

• Functional heat extraction hood

• Wide fender flares for lifted big wheel setup

• Steel front & rear bumpers + side steps / rock sliders

• 40" LED light bar, A-pillar ditch lights, smoked headlights

• Blackout trim package and custom badging

5. Classic Build Styles

• Daily & Towing Build

  2.5" level kit + 22×12 wheels + 35" A/T tires + Stage 1 Cummins tune

• Off-Road Aggressive Build

  6" suspension lift + Fox shocks + 24×14 wheels + 37" M/T tires + 5" exhaust

• Show Truck Build

  10" extreme lift + 26×16 deep dish forged wheels + widebody fenders

6. Installation Key Tips

• Hub centric ring：121.3mm

• Lug nut：M14×1.5 extended conical seat

• Wheel torque：170–180 N·m

• Large negative offset must match lift + fender flares to avoid rubbing

• Lifted trucks require professional four-wheel alignment