Industrial Injection 3662407112 Super PhatShaft 66 Turbocharger for 5.9L Cummins

The Industrial Injection Super PhatShaft 66 Turbocharger (PN: 3662407112) is a high-performance drop-in turbo upgrade engineered for heavily fueled 5.9L Cummins diesel engines. Capable of supporting 400 to 750 horsepower, this turbo is purpose-built for serious towing, street performance, and track use.

At the heart of the Super PhatShaft 66 is a 66mm extended-tip forged milled compressor wheel (FMW) paired with an industry-pioneering 71mm exducer turbine wheel. The oversized turbine wheel improves performance in two critical ways: it allows exhaust gases to exit the charger more efficiently—reducing cylinder backpressure and lowering exhaust gas temperatures (EGTs)—and it accelerates rotor speed to optimize air compression for stronger mid-range and top-end power delivery.

Key Features:

• 66mm Extended-Tip Forged Milled Compressor Wheel for maximum airflow efficiency and rapid spool-up
• 71mm Turbine Wheel (FMW) — reduces backpressure and lowers EGTs
• 360° Thrust Bearing for superior stability under high-boost conditions
• Dual Grooved High-Performance Journal Bearings for enhanced oil flow and rotor stability
• 14cm Exhaust Housing with modified nozzle angle, maximized wastegate ports, and enlarged wastegate chamber for full wastegate travel
• Custom Dual Oversized Wastegate Passages with included wastegate spacer plate for maximum efficiency
• Adjustable Boost Elbow included
• Drop-In Replacement design for straightforward installation
• Rated for 400–750 HP — ideal for trucks with multiple fueling upgrades

Note: 2004.5–2007 5.9L Cummins applications may require a Boost Fooler / Wastegate Sensor Fooler with installation of this turbocharger. All Industrial Injection performance products are intended for dedicated competition use only. Compliance with applicable emissions regulations is the consumer's responsibility.