Precision Remanufacturing Backed by Real Testing
At Turbo Kings, every PACCAR / Cummins 4318215 air compressor is rebuilt through a precision-controlled, OEM-verified process to restore original Bendix performance and output efficiency.
Manufactured by Bendix and installed on Cummins ISC, ISL, and PACCAR PX-8 engines from 2012 to present, this compressor belongs to the modern BA-921 platform — a compact, high-flow, single-cylinder design known for its balanced cooling, quiet operation, and long service life.
Rated at approximately 15.5 CFM at 1250 RPM, the BA-921 provides the consistent air supply needed for air brake, suspension, and accessory systems across medium- and heavy-duty Kenworth, Peterbilt, and Freightliner vocational trucks.
We don’t reseal or cosmetically refresh cores — we rebuild, calibrate, and certify them. Each unit is completely disassembled, media-cleaned, and inspected for bore wear, crankshaft alignment, and head flatness.
All critical internals — pistons, bearings, crank assemblies, and valve plates — are replaced with Bendix-spec OEM-grade components, restoring precise compression and long-term reliability.
During rebuilding, all air and coolant passages are ultrasonically cleaned, removing carbon, rust, and scale from deep internal galleries that standard washing cannot reach. Ultrasonic cleaning restores unrestricted airflow and full coolant circulation, ensuring temperature stability under continuous load.
After reassembly, each compressor is bench-tested in-house under simulated engine conditions, verifying pressure build rate, cut-in/cut-out behavior, and leak-free operation before serialization and release.
This is not assumed performance — it’s physically verified, right here at Turbo Kings.
What Makes a Turbo Kings Rebuild Different
Bendix OEM Foundation – Built using genuine Bendix engineering data, matched to Cummins ISC (2012–Present) and PACCAR PX-8 specifications.
In-House Flow & Pressure Testing – Each unit bench-tested for output pressure, oil carryover, and dynamic stability.
Ultrasonic Cleaning Process – All internal air and coolant lines ultrasonically restored for unrestricted flow and cooling.
Precision Machining – Decks, heads, and valve seats resurfaced to OEM tolerances for accurate sealing and pressure retention.
Pre-Lubricated & Ready to Install – Ships sealed and primed with lubricant for direct installation.
Warranty Confidence – Covered by a 12-month, unlimited-mileage warranty, supported by serialized test records.
Why Fleets and Owner-Operators Trust Turbo Kings
Fleets, service centers, and distributors trust Turbo Kings for our precision and verification-driven rebuild process.
Each compressor undergoes real-load bench testing and ultrasonic restoration, ensuring predictable performance in even the most demanding duty cycles.
With complete serialization, traceability, and fast turnaround, we deliver reliability you can measure — not just promise.
Our Process at a Glance
Disassembly & Cleaning – Full teardown, degreasing, and inspection.
Ultrasonic Passage Cleaning – Internal air and coolant passages restored to OEM cleanliness.
Parts Replacement & Machining – All wear components replaced; heads and housings machined to flatness spec.
Assembly & Torque Verification – Components aligned, torqued, and verified for proper clearance.
Flow & Pressure Testing – Bench-tested for flow rate, cut-out pressure, and oil carryover control.
Final Inspection & Documentation – Serialized, logged, and paired with warranty and performance data.
Standard Features
• Fully Flow- and Pressure-Tested
• Air & Water Passages Ultrasonically Cleaned
• Pre-Lubricated and Ready to Install
• Leak-Free and Output-Verified
• 12-Month Unlimited-Mileage Warranty
• Fast Core Exchange Program
Applications
Compatible with:
Cummins ISC, ISL, and PACCAR PX-8 engines (2012–Present)
Kenworth, Peterbilt, and Freightliner vocational trucks using Bendix BA-921 / 4318215 compressors
