Description
Description
Rebuilt fuel injector for Caterpillar 3508 and 3512 diesel engines.
Each injector is professionally rebuilt, ultrasonically cleaned, calibrated, and flow tested to OEM Caterpillar specifications. Every injector is verified before shipping to ensure precise fuel delivery, reliable engine performance, and long service life.
This injector is engineered to:
- Restore precise fuel atomization
- Improve throttle response and power delivery
- Reduce excessive smoke and rough engine operation
- Eliminate common injector performance issues
- Support consistent combustion and fuel efficiency
Designed for heavy-duty industrial, marine, power generation, and mining applications, this injector helps maintain dependable engine performance while meeting OEM fuel flow and spray pattern standards.
This injector replaces OEM Caterpillar injector part number 10R1277 and compatible superseded references. Fitment is verified before shipment.
Common Cross References
- 10R1277
- 170-5187
- 1705187
- 212-3469
- 2123469
- 20R1010
(Exact injector supplied depends on engine serial number and application — fitment is verified before shipping.)
Compatible Engines
- Caterpillar 3508
- Caterpillar 3508B
- Caterpillar 3512
- Caterpillar 3512B
Commonly used in:
- Marine propulsion systems
- Industrial power units
- Mining equipment
- Oil and gas applications
- Power generation systems
- Large off-highway equipment
Commonly installed in:
- Caterpillar Generator Sets
- Caterpillar Marine Engines
- Caterpillar Mining Equipment
- Caterpillar Industrial Power Systems
- Oilfield Power Units
- Various heavy-duty Caterpillar applications
Need Fitment Confirmation?
📞 Call or text (909) 639-4195
Have your engine serial number ready and we’ll confirm the correct injector before you order.
When your equipment is down, speed matters. We verify fast and ship fast.
Why Choose This Injector?
- Rebuilt to OEM Caterpillar fuel-flow and spray-pattern specifications
- Fully bench-tested for pressure, leakage, and performance
- Restores power, fuel efficiency, and smooth operation
- Built for long-term heavy-duty reliability
- Tested, verified, and engineered for uptime
Core Policy
A core refund is available when your old injector is returned.
Cores must be received within 30 days of purchase to qualify.
Shipping & Support
- Free UPS Ground shipping
- Expedited shipping available
- Backed by direct Samperio Turbo Rebuild technical support
You’ll speak to diesel experts, not call centers. Reliable support from people who know heavy-duty engines.




Reviews
There are no reviews yet.