Fleece Performance FPE-LB7-63 63mm Billet Cheetah Turbocharger for 2001–2004 LB7 Duramax

Wake up your 2001–2004 LB7 Duramax. The Fleece Performance FPE-LB7-63 Cheetah Turbo is a true bolt-in performance upgrade that delivers serious airflow, strong power potential, and excellent drivability without custom fabrication.

This 100% drop-in replacement features a precision-machined 63mm billet compressor wheel and a high-flow Inconel turbine wheel. It flows significantly more air than the stock LB7 turbo while maintaining near-factory spool-up characteristics. The result is lower EGTs under load, better throttle response, and a much higher power ceiling — up to 625 RWHP with proper supporting modifications (tuning, fuel system, and exhaust).

Key Benefits & Features

• 100% drop-in replacement for 2001–2004 GM 6.6L LB7 Duramax (Federal Emissions vehicles only)
• 63mm billet compressor wheel for increased airflow and headroom
• High-flow Inconel turbine wheel for durability under high exhaust temperatures
• Stock-like spool-up with noticeably stronger mid-range pull and towing performance
• Lower EGTs during sustained loads (great for towing and long hauls)
• Includes Fleece Performance LB7 High Flow Intake Horn for maximum flow
• Remote oil feed line helps protect the #4 cam journal bearing
• Potential gains of 60–85+ RWHP on a maxed-out EFI Live tune
• No core charge — keep your old turbo or dispose of it
• Complete installation kit with all necessary hardware, gaskets, and fittings

What’s Included

• Fleece Performance 63mm Billet LB7 Cheetah Turbocharger
• Fleece LB7 High Flow Intake Horn
• Installation kit

Fitment Notes (Critical)

• Fits only 2001–2004 GM 6.6L Duramax LB7 Federal Emissions trucks
• Does NOT fit California-emissions or California-delivered vehicles
• Does not fit LLY (2004.5+), LBZ, LMM, or later Duramax engines
• Confirm your truck is a Federal Emissions LB7 before ordering

Performance Expectations

On a stock or lightly modified LB7, you’ll notice sharper response and the ability to maintain boost under load with lower exhaust gas temperatures. With supporting mods (EFI Live tuning, larger exhaust, intake, and upgraded fuel delivery), this turbo supports builds up to approximately 625 RWHP.

It is not a stock-replacement turbo — it is a performance upgrade designed to give your LB7 real headroom.

Installation

This is a true drop-in unit. All necessary hardware and gaskets are included. Professional installation is recommended. After installation, perform a boost leak test on the charge air system. A custom tune is strongly recommended to safely take advantage of the increased airflow.