Precision-Built for Maximum Air System Reliability
The Turbo Kings AD-SP “65691” Air Dryer is a brand-new, high-performance replacement engineered to meet or exceed the durability and flow capacity of the Bendix AD-SP series. Designed and manufactured entirely by Turbo Kings, this unit delivers consistent purge cycles, rapid recharge times, and superior air quality protection for heavy-duty truck applications.
Each unit is factory-new, not remanufactured, and built with upgraded materials to handle the demanding duty cycles of today’s high-output air compressors. The AD-SP’s compact single-piston design reduces internal friction and simplifies maintenance while maintaining optimal moisture removal and oil vapor filtration throughout the system.
Precision Engineering and Premium Components
Turbo Kings’ AD-SP air dryers are built under controlled manufacturing standards to ensure reliability from day one. Every casting, seal, and internal passage is engineered for thermal stability, corrosion resistance, and airtight integrity.
Brand-New Aluminum Housing: CNC-machined to exact tolerances and anodized for long-term corrosion protection.
High-Flow Check Valve Assembly: Guarantees rapid system recharge and minimal pressure drop.
Factory-Sealed Purge Valve System: Delivers consistent air purging at the end of every compressor cycle.
Pre-Installed 12V Heater Element: Tested for electrical draw and continuity to prevent freeze-ups in subzero climates.
Advanced Desiccant Cartridge: Filled with high-capacity moisture-absorbent media to maintain dry air performance across thousands of cycles.
Integrated Governor Compatibility: Supports standard 120–135 PSI cut-in/cut-out regulation ranges.
Each air dryer is hydraulically sealed, pressure-tested, and vacuum-verified for zero internal leaks. The result is a plug-and-play solution that installs seamlessly in place of factory Bendix AD-SP units without requiring re-plumbing or modification.
Why Fleets and Owner-Operators Trust Turbo Kings
Turbo Kings air dryers are built for the realities of fleet operation—long duty cycles, harsh climates, and unforgiving road environments. By manufacturing our AD-SP line completely new (not re-cored), we eliminate inherited wear patterns and guarantee consistency across every unit shipped.
Operators experience faster reservoir recovery, improved purge efficiency, and significantly reduced compressor strain—translating to lower maintenance costs and longer service intervals across the air-brake system.
Our new-build AD-SP dryers are serialized, pressure-certified, and backed by Turbo Kings’ 6-month / Unlimited Mileage warranty for total confidence on the road.
Our Process at a Glance
CNC Machining of Housing & Ports
Anodized Surface Treatment for Corrosion Resistance
Assembly with OEM-Grade O-Rings & Seals
Electrical & Pressure Testing up to 150 PSI
Moisture Capacity & Purge Cycle Verification
Final Inspection and Serialization
Specifications
Operating Pressure: 120–150 PSI
Voltage: 12 V Heater
Type: Single-Piston AD-SP
Warranty: 6 Months / Unlimited Mileage
Core Charge: None (Brand New Unit)
