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Technical DrawingBlueprint archive
R050
Gran Turismo Authority
2018 Chevrolet Tahoe
The 2018 Chevrolet Tahoe Gran Turismo Authority redefines what an SUV can do on the endurance racing circuit. By extending the wheelbase and adopting a rear transaxle layout, this build achieves near-ideal weight distribution and handling balance, essential for long stints at speed. The functional widebody consists of squared front arches and sweeping convex rear flares that accommodate FIA-spec 330mm endurance tires, while integrated aerodynamic elements like a large dual-element rear wing and front splitter with dive planes optimize high-speed stability and downforce.
Under the hood, the stock V8 is transformed with a dry sump system and enhanced cooling fed through sidepod radiators, ensuring reliability during extended track sessions. The six-speed sequential transmission linked to the rear transaxle supports quick, precise shifts. A lowered stance on adaptive racing suspension tightens the center of gravity, completing a package that blends the Tahoe’s rugged origins with cutting-edge GT4 endurance performance.
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Engineering record. Exhibition artifact.
The technical study and collectible interpretation of one build, preserved together.
Technical Dossier
▧
Platform
2018 Chevrolet Tahoe
The 2018 Chevrolet Tahoe stands as a commanding full-size SUV platform, blending rugged capability with refined street presence. Built on GM’s GMT K2XX architecture, it features a robust body-on-frame construction designed for serious towing and off-road performance, yet it delivers enough composure and technology to feel at home in urban environments. Its muscular proportions and purposeful stance have made it a staple for enthusiasts who value versatility, durability, and a commanding road presence.
⌘
Aero Package
Dual-element rear wing mounted on 780mm-high swan-neck pylons
Front splitter extended 140mm with twin 100mm upward dive planes
Flush louvered hood vents paired with vertical radiator extractors
Sidepod radiators integrated behind front arches with large duct inlets
⟡
Chassis
Optimized for endurance circuits, the Tahoe Gran Turismo Authority excels in high-speed stability and tire management. Its widened track and aerodynamic package deliver balanced downforce and predictable handling, while adaptive suspension and cooling systems preserve performance consistency through extended race durations.
◎
Wheels & Tires
HRE Track Series forged wheels: 19x11 front, 20x12 rear
Michelin Pilot Sport GT4 330mm tires front and rear
Forged wheel centers with forged lips for weight reduction and strength
▤
Powertrain
Stock V8 engine extensively upgraded for endurance reliability
Dry sump lubrication system for consistent oil delivery under high G
Sidepod-mounted radiators fed by large ducted inlets for enhanced cooling
6-speed paddle-shift sequential gearbox integrated into rear transaxle
△
Fabrication Notes
Lightweight aluminum rear transaxle housing repositioned rearward
Custom widebody panels formed for aerodynamic efficiency and tire clearance
Adaptive racing suspension components tuned for lowered center of gravity
Structural reinforcements to support widened track and aerodynamic loads
×
Design Philosophy
The 2018 Chevrolet Tahoe Gran Turismo Authority redefines what an SUV can do on the endurance racing circuit. By extending the wheelbase and adopting a rear transaxle layout, this build achieves near-ideal weight distribution and handling balance, essential for long stints at speed. The functional widebody consists of squared front arches and sweeping convex rear flares that accommodate FIA-spec 330mm endurance tires, while integrated aerodynamic elements like a large dual-element rear wing and front splitter with dive planes optimize high-speed stability and downforce.
Under the hood, the stock V8 is transformed with a dry sump system and enhanced cooling fed through sidepod radiators, ensuring reliability during extended track sessions. The six-speed sequential transmission linked to the rear transaxle supports quick, precise shifts. A lowered stance on adaptive racing suspension tightens the center of gravity, completing a package that blends the Tahoe’s rugged origins with cutting-edge GT4 endurance performance.
▧Platform+
2018 Chevrolet Tahoe
The 2018 Chevrolet Tahoe stands as a commanding full-size SUV platform, blending rugged capability with refined street presence. Built on GM’s GMT K2XX architecture, it features a robust body-on-frame construction designed for serious towing and off-road performance, yet it delivers enough composure and technology to feel at home in urban environments. Its muscular proportions and purposeful stance have made it a staple for enthusiasts who value versatility, durability, and a commanding road presence.
⌘Aero Package+
Dual-element rear wing mounted on 780mm-high swan-neck pylons
Front splitter extended 140mm with twin 100mm upward dive planes
Flush louvered hood vents paired with vertical radiator extractors
Sidepod radiators integrated behind front arches with large duct inlets
⟡Chassis+
Optimized for endurance circuits, the Tahoe Gran Turismo Authority excels in high-speed stability and tire management. Its widened track and aerodynamic package deliver balanced downforce and predictable handling, while adaptive suspension and cooling systems preserve performance consistency through extended race durations.
◎Wheels & Tires+
HRE Track Series forged wheels: 19x11 front, 20x12 rear
Michelin Pilot Sport GT4 330mm tires front and rear
Forged wheel centers with forged lips for weight reduction and strength
▤Powertrain+
Stock V8 engine extensively upgraded for endurance reliability
Dry sump lubrication system for consistent oil delivery under high G
Sidepod-mounted radiators fed by large ducted inlets for enhanced cooling
6-speed paddle-shift sequential gearbox integrated into rear transaxle
△Fabrication Notes+
Lightweight aluminum rear transaxle housing repositioned rearward
Custom widebody panels formed for aerodynamic efficiency and tire clearance
Adaptive racing suspension components tuned for lowered center of gravity
Structural reinforcements to support widened track and aerodynamic loads
×Design Philosophy+
The 2018 Chevrolet Tahoe Gran Turismo Authority redefines what an SUV can do on the endurance racing circuit. By extending the wheelbase and adopting a rear transaxle layout, this build achieves near-ideal weight distribution and handling balance, essential for long stints at speed. The functional widebody consists of squared front arches and sweeping convex rear flares that accommodate FIA-spec 330mm endurance tires, while integrated aerodynamic elements like a large dual-element rear wing and front splitter with dive planes optimize high-speed stability and downforce.
Under the hood, the stock V8 is transformed with a dry sump system and enhanced cooling fed through sidepod radiators, ensuring reliability during extended track sessions. The six-speed sequential transmission linked to the rear transaxle supports quick, precise shifts. A lowered stance on adaptive racing suspension tightens the center of gravity, completing a package that blends the Tahoe’s rugged origins with cutting-edge GT4 endurance performance.
Part of
Wave 09
SUV Track Program
Here at Widebody Syndicate, we took the family haulers you thought you knew and strapped on enough aero and muscle to make race teams reconsider their choices. This batch is not your typical Sunday grocery getter lineup — these SUVs went full pro racing spec, blending brute American muscle, Euro touring tech, and downright aggressive hill climb madness.
Explore Wave 09 → 6 Builds
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The archive is always growing. New releases, waves, and blueprints added regularly.