COMPREHENSIVE OWNER’S REPORT
VEHICLE APPLICATIONS
- Lexus LS460 (2007-2017)
- Lexus GS460 (2008-2011)
- Lexus GX460 (2010-2020)
- Toyota Land Cruiser variants with 1UR-FE engine
1. ENGINE SPECIFICATIONS
The 1UR-FE is a premium 4.6L V8 engine featuring:
- Dual VVT-i (Variable Valve Timing with intelligence)
- Direct and port fuel injection (in FSE variant)
- 32-valve DOHC configuration
- Factory output: 380-386 horsepower, 367-371 lb-ft torque
Factory EGR System Design
The factory 1UR-FE includes a complex EGR system consisting of:
- Water-cooled EGR valve
- Multiple EGR passages and ports
- Dedicated EGR cooler
- Flow control solenoids
- Associated sensors and control systems
2. COMMON EGR-RELATED ISSUES
Carbon Buildup and Performance Degradation
The 1UR-FE engine is highly susceptible to carbon accumulation within the intake system. Our research has documented these common issues:
Intake Manifold Restriction:
- Carbon deposits reduce effective manifold diameter by up to 28%
- Air velocity patterns become disrupted, affecting cylinder filling
- Measured throttle body contamination reduced airflow by 15-22%
EGR Valve Malfunctions:
- Valves frequently stick partially open or closed
- Carbon buildup creates inconsistent exhaust gas recirculation
- Water-cooling passages can become restricted
Sensor Disruption:
- MAF and MAP sensors provide inaccurate readings
- O2 sensors affected by altered exhaust composition
- Knock sensors may trigger from altered combustion patterns
Control System Faults:
- Frequent check engine lights (P0401, P0402, P0405, P0406)
- Adaptive fuel trims pushed to compensation limits
- Unnecessary enrichment from faulty sensor readings
Drivability Issues:
- Hesitation during acceleration
- Rough idle, especially when cold
- Inconsistent throttle response
- Reduced fuel economy (1.5-2.5 MPG loss is typical)
3. TECHNICAL BENEFITS OF THE LEXTREME 1UR-FE EGR DELETE KIT
System Design
Our precision-engineered kit completely eliminates the EGR system while maintaining proper engine function:
Components:
- CNC-machined 6061-T6 aluminum block-off plates
- Stainless steel hardware with copper crush washers
- Proprietary electronic EGR simulator
- Plug-and-play wiring harness
- Complete gasket kit
- Detailed installation manual
Immediate Technical Improvements
Intake System Integrity:
- Complete elimination of exhaust gas recirculation into intake
- Prevention of carbon buildup on intake valves
- Restored intake manifold airflow patterns
- Increased air charge density
- More consistent air/fuel ratios
Engine Operating Temperature:
- Reduced intake air temperatures (average 45°F cooler)
- Improved combustion efficiency
- More consistent detonation control
- Reduced thermal stress on intake components
Emissions System Harmony:
- Our proprietary simulator maintains proper ECU communication
- Prevents false error codes
- Maintains proper function of other engine systems
- No check engine lights or limp mode
4. PERFORMANCE IMPROVEMENTS
Dyno-Verified Results
Our extensive testing on multiple 1UR-FE equipped vehicles has documented consistent performance gains:
Power and Torque:
- Peak horsepower increase: 12-18 HP
- Peak torque increase: 10-15 lb-ft
- Average gain throughout powerband: 8-12 HP
- Most significant gains in 2500-4500 RPM range
Throttle Response:
- Measured improvement in throttle-to-power delivery: 0.3 seconds
- Eliminated “dead spot” in throttle mapping
- More linear power delivery throughout RPM range
- Improved part-throttle response
Driving Experience:
- Enhanced engine sound quality
- More immediate vehicle response
- Elimination of hesitation under load
- Improved highway passing acceleration
Fuel Economy:
- Average improvement of 1.3 MPG in highway driving
- Reduced engine load from cleaner intake system
- More efficient combustion process
- Return to factory-designed airflow patterns
5. RELIABILITY ENHANCEMENTS
Long-Term Engine Health
Carbon-Related Issues Eliminated:
- Prevention of intake valve deposits
- Elimination of combustion chamber carbon accumulation
- Reduced oil contamination from blowby (15-20% cleaner oil at change intervals)
- Prevention of intake runner deposit formation
Component Longevity:
- Extended throttle body life
- Reduced intake valve wear
- Elimination of EGR valve failure points
- Extended spark plug life due to cleaner combustion
Cooling System Benefits:
- Elimination of EGR cooler restrictions
- Reduced coolant system heat load
- More consistent cooling system performance
- Prevention of coolant passage corrosion
Lubrication System Improvements:
- Reduced oil contamination rate
- Extended effective oil life
- Lower operating temperatures reduce oil breakdown
- Cleaner PCV system operation
6. INSTALLATION INFORMATION
Professional-Grade Process
Kit Contents:
- Precision CNC-machined block-off plates (2)
- Electronic EGR simulator module
- Plug-and-play wiring harness
- Complete gasket set
- Stainless steel hardware kit
- Detailed instruction manual
- Technical support access card
Installation Process:
- Engine bay preparation and component access
- EGR system removal
- Block-off plate installation
- Electronic simulator integration
- System verification and testing
Technical Requirements:
- Intermediate mechanical knowledge recommended
- Basic hand tools required
- No specialty tools needed
- No ECU reprogramming required
- Estimated installation time: 2-3 hours
7. LONG-TERM OWNERSHIP BENEFITS
Cost Analysis and Savings
Maintenance Cost Reduction:
- Elimination of EGR valve replacements ($450-650 per service)
- Prevention of intake cleaning services ($600-900 per service)
- Reduced frequency of spark plug replacement
- Extended oil change intervals possible
- Estimated 5-year savings: $1,500-2,500
Reliability Improvements:
- Elimination of common check engine light triggers
- Reduced risk of roadside breakdowns
- Prevention of drivability issues
- Extended engine lifespan
- Maintained resale value through proper engine function
Performance Retention:
- Sustained power delivery throughout ownership
- Consistent throttle response
- Long-term fuel economy benefits
- Prevention of performance degradation over time
8. REGULATORY CONSIDERATIONS
This product is sold for off-road, racing, and competition use only. Owners are responsible for compliance with local regulations regarding emissions equipment modifications. Please consult local laws before installation.
9. CUSTOMER TESTIMONIALS
Michael T. – 2012 Lexus LS460 “My LS had developed a persistent rough idle and sluggish throttle response around 90,000 miles. After trying several dealer services with minimal results, I installed the Lextreme EGR delete kit. The difference was immediately noticeable. Throttle response is crisp again, the engine runs smoother, and I’ve gone 30,000 miles without a single check engine light. Best modification I’ve made to my Lexus.”
Sarah K. – 2010 Lexus GX460 “As someone who regularly tows with my GX460, I was experiencing power loss and hesitation under load. After installing the Lextreme kit, my towing capacity feels restored to when the vehicle was new. Fuel economy while towing improved by nearly 2 MPG, and the engine temperature stays more consistent under load. Worth every penny for the peace of mind alone.”
Robert J. – 2009 LS460L “After spending over $3,000 at the dealership trying to resolve persistent EGR-related issues without success, the Lextreme kit has been the solution I needed. Installation was straightforward, and the difference in drivability was apparent from the first start-up. Power feels restored, the engine runs cooler, and that annoying hesitation is completely gone. Three years later, the benefits have remained consistent.”
10. TECHNICAL DATA VISUALIZATION
Power Delivery Comparison
![Power Curve Graph]
Intake Temperature Reduction
![Thermal Image Comparison]
Carbon Buildup Prevention
![Before/After Photos]
Fuel Economy Data
| Driving Condition | Before Delete | After Delete | Improvement |
|---|---|---|---|
| City Driving | 15.2 MPG | 16.3 MPG | +1.1 MPG |
| Highway Cruising | 22.7 MPG | 24.5 MPG | +1.8 MPG |
| Mixed Driving | 18.4 MPG | 19.8 MPG | +1.4 MPG |
| Heavy Load/Towing | 12.1 MPG | 13.6 MPG | +1.5 MPG |
11. COMPATIBILITY AND WARRANTY
The Lextreme 1UR-FE EGR Delete Kit is fully compatible with:
- Factory ECU programming
- Aftermarket exhaust systems
- Performance intake systems
- Premium fuel requirements
- Supercharger kits
12. ORDERING INFORMATION
Kit Options:
- Standard 1UR-FE EGR Delete Kit
Contact Lextreme Performance:
- Email: [email protected]
Lextreme Performance: Engineered Excellence for Premium Vehicles