
Product Introduction
The X12 cylinder kit 4376178 is a high-performance engine overhaul solution designed for Cummins ISG12, X12, and X13 diesel engine platforms, widely used in FOTON AUMAN GTL and EST heavy-duty trucks.
This cylinder kit is engineered for full engine restoration, helping recover compression efficiency, combustion stability, and original power output for high-mileage or heavily loaded commercial vehicles.
It typically includes piston assemblies, piston rings, cylinder liners, and piston pins, all manufactured under strict OEM-equivalent standards to ensure precise fitment, stable sealing performance, and long service life under continuous operation.
Designed for long-haul logistics, construction transport, and high-load fleet operations, the X12 cylinder kit delivers reliable performance under extreme temperature and pressure conditions. It helps reduce oil consumption, improve fuel efficiency, and restore engine power output.
Each kit is strictly inspected before shipment, including dimensional accuracy checks, material strength verification, and durability testing to ensure consistent global aftermarket quality.

Technical Specifications
| Item | Specification |
| Product Name | Cylinder Kit |
| Part Number | 4376178 |
| Engine Model | Cummins ISG12 / X12 / X13 |
| Engine Type | Inline 6 Cylinder Diesel Engine |
| Fuel Type | Diesel |
| Main Components | Piston, Piston Ring, Cylinder Liner, Pin Kit |
| Material | High Strength Alloy / Cast Iron |
| Cooling Type | Water Cooled Engine System |
| Application Type | Heavy Duty Truck Engine Repair |
| OEM Standard | Yes |
| Condition | New |
| Quality Test | 100% Tested Before Shipment |
| Packaging | Export Standard Wooden / Carton Box |
| Origin | China |
| Availability | In Stock / Ready to Ship |
Vehicle Fitment
| Vehicle Brand | Compatible Models | Engine Models |
| FOTON | AUMAN GTL | ISG12 / X12 |
| FOTON | AUMAN EST | ISG12 / X12 |
| FOTON | AUMAN ETX | X12 Compatible Applications |
| DONGFENG | Selected Heavy Duty Models | X12 Platform Engines |
| SHACMAN | Selected Applications | X12 Compatible Engines |
Payment & Shipping
| Category | Options |
| Payment Methods | T/T (Bank Transfer), PayPal, Western Union, MoneyGram, Visa, MasterCard, L/C (Letter of Credit), Alibaba Trade Assurance |
| Express Shipping | DHL, FedEx, UPS, TNT |
| Freight Shipping | Air Freight, Sea Freight, Railway Freight |
| Delivery Time | Express: 3–7 Working Days; Air Freight: 7–15 Days; Sea Freight: 20–45 Days |
| Shipping Coverage | Worldwide Shipping Available |
| Trade Terms | EXW, FOB, CFR, CIF, DDP |
Related Products Categories
| Section/System | Common Spare Parts |
| Cylinder Block & Cylinder Head | Cylinder Block, Cylinder Head, Cylinder Liner, Piston, Piston Ring, Cylinder Head Gasket |
| Crankshaft System | Crankshaft, Connecting Rod, Main Bearing, Connecting Rod Bearing, Thrust Washer |
| Valve Train | Intake Valve, Exhaust Valve, Camshaft, Rocker Arm, Valve Spring |
| Turbocharger System | Turbocharger, Turbo Repair Kit, Intercooler, Intake Pipe |
| Fuel System | Fuel Injector, Injector Nozzle, Fuel Pump, Fuel Filter |
| Cooling System | Water Pump, Thermostat, Radiator, Expansion Tank |
| Lubrication System | Oil Pump, Oil Filter, Oil Cooler, Oil Pan |
| Intake & Exhaust System | Air Filter, Air Cleaner Assembly, Exhaust Pipe, Muffler, DPF, SCR |
| Engine Electrical Parts | Starter Motor, Alternator, Sensors, Wiring Harness |
Transmission & Drivetrain Parts
| Section/System | Common Spare Parts |
| Clutch System | Clutch Disc, Pressure Plate, Release Bearing, Clutch Master Cylinder, Clutch Booster |
| Transmission System | Gearbox Assembly, Synchronizer, Gear Set, Bearing, Oil Seal, Shift Fork |
| PTO System | PTO Assembly, PTO Gear, PTO Pump, PTO Seal |
| Driveshaft System | Driveshaft Assembly, Universal Joint, Center Bearing, Slip Yoke |
| Differential System | Differential Assembly, Crown Wheel & Pinion, Differential Bearing, Repair Kit |
| Section/System | Common Spare Parts |
| Front Axle | Kingpin Kit, Steering Knuckle, Ball Joint, Tie Rod, Wheel Bearing |
| Rear Drive Axle | Axle Housing, Half Shaft, Differential Housing, Hub Bearing |
| Suspension System | Leaf Spring, Air Spring, Shock Absorber, Equalizer Beam, U-Bolt |
| Steering System | Steering Gearbox, Power Steering Pump, Drag Link, Steering Shaft |
| Brake System | Brake Drum, Brake Disc, Brake Pad, Brake Chamber, Slack Adjuster |
| Wheel Hub System | Wheel Hub, Wheel Bearing, Oil Seal, Wheel Bolt, Wheel Nut |
Cabin & Body Parts
| Section/System | Common Spare Parts |
| Cabin Assembly | Cabin Shell, Cabin Suspension, Cabin Lock, Cabin Mount |
| Dashboard System | Instrument Cluster, Dashboard Panel, Switch Assembly |
| Door System | Door Assembly, Door Lock, Door Handle, Window Regulator |
| Seat System | Driver Seat, Passenger Seat, Seat Shock Absorber |
| Air Conditioning System | AC Compressor, Condenser, Evaporator, Blower Motor |
| Electrical System | Headlamp, Tail Lamp, Fog Lamp, Wiring Harness, Relay |
| Mirror System | Rear View Mirror, Mirror Arm, Mirror Cover |
| Body Exterior Parts | Bumper, Grille, Fender, Mudguard, Step Panel |
