2021 TOYOTA GR YARIS 4WD

For sale is my extensively engineered 2021 Toyota GR Yaris, professionally built by Garage Whifbitz and SpecJ Motorsport with a focus on reliability, drivability and outright performance.

This is not your average GR Yaris. The car has been developed using some of the best components available for the platform and maintained regardless of cost throughout my ownership. The aim of the build was never simply to chase dyno numbers, but to create an exceptionally capable road car that remains reliable, usable and rewarding to drive.

The majority of the build was completed during winter 2023/2024. To minimise downtime, a brand-new long block and cylinder head were purchased and fully engineered by SpecJ Motorsport at just over 28,000 miles, rather than rebuilding the original engine.

Final suspension geometry, corner weighting and chassis setup were carried out by Ben at String Theory Garage, while engine and drivetrain calibrations were completed by Paul Whiffin at Garage Whifbitz and Ryan at Syvecs respectively.

The car remains fully trimmed with the original interior, retains excellent road manners and is surprisingly refined considering the level of performance available. It is equally capable as a fast road car, track car or hill climb machine should the next owner wish to take it further.

Since completion, the car has been maintained to an extremely high standard, with fluids and spark plugs replaced at a minimum of six-month intervals.

The result is a genuinely sorted GR Yaris producing up to 540whp on E80 flex fuel. For everyday use, the 99RON calibration delivers a more conservative yet still hugely capable 392whp, providing excellent drivability and reliability while remaining devastatingly quick.

───

Engine & Turbo System

At just over 28,000 miles in December 2023, the car received a complete new engine and cylinder head build by SpecJ Motorsport, including:

• CNC ported cylinder head

• Closed deck block conversion

• Cylinder honing and micro-balancing

• HKS head gasket

• Supertech black nitrided stainless steel inlet valves and sodium filled Inconel exhaust valves

• Supertech Bronze valve guides

• Kelford G16E-GTS 266/274 billet camshafts

• Kelford beehive valve springs & titanium retainers

• Nitto forged pistons - rated to over 300bhp per cylinder

• Nitto H-beam conrods

• Lamspeed H13 head stud kit

───

Turbo & supporting hardware:

• Garage Whifbitz turbo kit

• Garrett G25-660 turbocharger

• Turbosmart external wastegate

• 3” downpipe & midpipe

• Thermo Met heat shielding

• Funk Motorsport turbo blankets

• Garage Whifbitz GPF-back titanium resonated exhaust system

• Forge Motorsport race intercooler with upgraded boost pipework

• Forge Motorsport oil cooler

• Lamspeed Racing billet inlet manifold

• Larger Bosch throttle body

• Eventuri matte carbon intake kit

• Okada Projects Plasma Direct ignition coils

• HKS iridium race spark plugs

• Haltech boost control solenoid

• Lamspeed baffled sump

• Turbosmart Raceport BOV

• HEL oil catch can

• Airtec coolant header tank

• Samco coolant hoses

───

Fuel system:

• Garage Whifbitz standalone fuel system

• Radium surge tank

• Walbro 525LPH fuel pump

• Flex fuel sensor

• E85-compatible Teflon braided fuel lines throughout

• ASNU 1300cc injectors

───

Engine management:

• Syvecs GR Yaris ECU

• 4 switchable engine maps controlled via steering wheel buttons (low, medium, high boost on 99RON & >E80 high boost)

• Launch control

• Rolling anti-lag controlled via steering wheel buttons

Power figures:

• 392WHP on 99RON pump fuel

• 540WHP on E80 flex fuel mapping

───

Drivetrain

• Kotouc 7-speed sequential gearbox

(Aircraft-grade billet construction, rated to 1400nm of torque)

• Kotouc GR Yaris Street package

• Carbon fibre gear lever with integrated strain gauge

• Reverse lockout release trigger

• Adjustable billet shifter frame

• Gear display indicator mounted under media unit

• Kotouc externally adjustable front LSD

• ATS twin-plate carbon clutch

• Cusco RS 1.5/2-way (switchable) rear LSD

• Brena Racing correct ratio crownwheel & pinion

• Syvecs 4WD controller - Professionally mapped on uncoupled 4WD dyno by Ryan at Syvecs

The drivetrain setup allows a genuine locked 50:50 torque split and transforms the way the car handles, while also limiting any slip and extending the lifespan of the factory ITCC system.

───

Suspension & Chassis

• KW V3 coilovers

• Upgraded 250mm/61mm ID 50n/mm springs with Clubsport top mounts

• Original KW springs included

• Cusco anti-roll bars

• Cusco strut braces

• Cusco adjustable control arms

• Cusco pillow-ball bushes throughout

• Hardrace spherical front bushings

• SW Motorsport rear chassis brace

• Powerflex upper & lower engine/gearbox inserts

• Full suspension geometry and corner weighting setup by String Theory Garage.

The car sits close to OEM ride height while offering significantly improved handling capability and excellent composure whilst assuring good ground clearance.

The car has also received powder coating to various underbody and suspension components, including the subframes, for improved durability against UK weather conditions.

───

Brakes

Front:

• Garage Whifbitz/AP Racing 362mm big brake kit with AP Racing CP7040 forged 6-pot calipers and AP Racing 362mm J-hook discs

Rear:

• Garage Whifbitz/AP Racing 330mm big brake kit with AP Racing CP3215 forged 4-pot calipers and AP Racing 330mm J-hook discs

Additional braking upgrades:

• Porterfield R4S pads front & rear

• Goodridge braided brake lines

• Anodised black bells & mounting hardware throughout

───

Bodywork & Exterior

• Garage Whifbitz M-Style carbon bonnet

• RSIC6 carbon vented front fenders

• RSIC6 carbon front splitter

• RSIC6 carbon side skirts

• Koshi full carbon rear diffuser

• Pandem Rocket Bunny rear wing colour match to body and support struts in gloss black

• BFM vented rear bumper

• Phoenix Composites custom carbon front badge intake

• Toyota wind deflectors

• Axis Parts Japan carbon vortex generator

• Axis Parts Japan carbon fuel cap cover

• Axis Parts Japan carbon upper duct covers

• Axis Parts Japan carbon mud flaps

• Axis Parts Japan carbon boot step guard

• Axis Parts Japan carbon window mould covers

• Axis Parts Japan carbon wing mirror covers

• Original vinyl roof wrap removed, carbon and replaced with STEK carbon pattern PPF

• GR badges have protective vinyl applied in green and red with white GR text - easily removed if needed

• Zunsport front grille set

• Automotive Passion black badge set

• Cusco front tow eye

The car has been used and has normal wear and tear on the paintwork.

Protected with a full 5 year ceramic coating package.

───

Interior

• Custom Alcantara dashboard & door trim

• STG Alcantara steering wheel

• Phoenix Composites carbon steering wheel trims, media surround & handbrake lever with fly off function.

• Axis Parts Japan carbon window switch covers

• HKS front and rear floor mats & boot mat

• Custom GR heel/toe plate

• SW Motorsport driver static seat lowering frame - Original driver seat rails included

Audio system professionally upgraded by SJ Concepts:

• Phoenix Gold amplifier

• Phoenix Gold ZR speakers

• Hidden Phoenix gold subwoofer installation under boot floor

• Lightweight sound deadening under carpets and in door panels

• Wireless Android auto/ Apple car play

• Qi2 Magnetic Wireless phone charging mount

Also fitted with:

• SW Motorsport extinguisher bracket

• Firexo extinguisher

• NOCO Genius hard-wired battery charger/conditioner with 3-pin plug connector mounted in boot

───

Wheels

• Enkei RS05RR 18x9 ET35 wheels in gunmetal

• Enkei duralumin locking wheel nuts

• Yokohama Advan A052 tyres fitted

───

Security includes:

• Thatcham-approved immobiliser

• Remote ignition cut-off

• S5 tracker system with 24/7 monitoring, live tracking and alerts

───

Mileage

• Chassis mileage: 45,148 miles

• Engine build, gearbox and majority of major drivetrain and suspension components have covered approximately 16,700 miles

───

Serviced 420 miles ago at Garage Whifbitz:

• Engine oil and filter

• Gearbox oil

• Spark plugs

• Air filter cleaned

───

Summary

This represents a rare opportunity to acquire one of the highest-specification GR Yaris builds in the UK, professionally engineered using exceptional components throughout and maintained to an uncompromising standard.

The car combines supercar-killer performance with genuine road usability, retaining a full interior, upgraded audio system, climate control and excellent motorway manners. Every aspect of the build has been carefully considered, with reliability and drivability given equal importance to outright performance.

This is not a freshly completed build being sold immediately after completion. The current engine build, gearbox and major drivetrain components have covered approximately 16,700 miles and the car has proven itself to be both reliable and usable in real-world driving.

The build has been carried out by some of the most respected names within the GR Yaris community, including Garage Whifbitz, SpecJ Motorsport and String Theory Garage, with extensive documentation available to support the car's history and specification.

The cost to purchase and replicate this build today would comfortably exceed the asking price.

Sale is only due to ongoing health issues and to help fund further treatment.

MOT until June 2027 with no advisories.

Registration "MY03 POT" included in the sale.

Paperwork, invoices, dyno graphs and build history available.

Serious enquiries only.For sale is my extensively engineered 2021 Toyota GR Yaris, professionally built by Garage Whifbitz and SpecJ Motorsport with a focus on reliability, drivability and outright performance.

This is not your average GR Yaris. The car has been developed using some of the best components available for the platform and maintained regardless of cost throughout my ownership. The aim of the build was never simply to chase dyno numbers, but to create an exceptionally capable road car that remains reliable, usable and rewarding to drive.

The majority of the build was completed during winter 2023/2024. To minimise downtime, a brand-new long block and cylinder head were purchased and fully engineered by SpecJ Motorsport at just over 28,000 miles, rather than rebuilding the original engine.

Final suspension geometry, corner weighting and chassis setup were carried out by Ben at String Theory Garage, while engine and drivetrain calibrations were completed by Paul Whiffin at Garage Whifbitz and Ryan at Syvecs respectively.

The car remains fully trimmed with the original interior, retains excellent road manners and is surprisingly refined considering the level of performance available. It is equally capable as a fast road car, track car or hill climb machine should the next owner wish to take it further.

Since completion, the car has been maintained to an extremely high standard, with fluids and spark plugs replaced at a minimum of six-month intervals.

The result is a genuinely sorted GR Yaris producing up to 540whp on E80 flex fuel. For everyday use, the 99RON calibration delivers a more conservative yet still hugely capable 392whp, providing excellent drivability and reliability while remaining devastatingly quick.

───

Engine & Turbo System

At just over 28,000 miles in December 2023, the car received a complete new engine and cylinder head build by SpecJ Motorsport, including:

• CNC ported cylinder head

• Closed deck block conversion

• Cylinder honing and micro-balancing

• HKS head gasket

• Supertech black nitrided stainless steel inlet valves and sodium filled Inconel exhaust valves

• Supertech Bronze valve guides

• Kelford G16E-GTS 266/274 billet camshafts

• Kelford beehive valve springs & titanium retainers

• Nitto forged pistons - rated to over 300bhp per cylinder

• Nitto H-beam conrods

• Lamspeed H13 head stud kit

───

Turbo & supporting hardware:

• Garage Whifbitz turbo kit

• Garrett G25-660 turbocharger

• Turbosmart external wastegate

• 3” downpipe & midpipe

• Thermo Met heat shielding

• Funk Motorsport turbo blankets

• Garage Whifbitz GPF-back titanium resonated exhaust system

• Forge Motorsport race intercooler with upgraded boost pipework

• Forge Motorsport oil cooler

• Lamspeed Racing billet inlet manifold

• Larger Bosch throttle body

• Eventuri matte carbon intake kit

• Okada Projects Plasma Direct ignition coils

• HKS iridium race spark plugs

• Haltech boost control solenoid

• Lamspeed baffled sump

• Turbosmart Raceport BOV

• HEL oil catch can

• Airtec coolant header tank

• Samco coolant hoses

───

Fuel system:

• Garage Whifbitz standalone fuel system

• Radium surge tank

• Walbro 525LPH fuel pump

• Flex fuel sensor

• E85-compatible Teflon braided fuel lines throughout

• ASNU 1300cc injectors

───

Engine management:

• Syvecs GR Yaris ECU

• 4 switchable engine maps controlled via steering wheel buttons (low, medium, high boost on 99RON & >E80 high boost)

• Launch control

• Rolling anti-lag controlled via steering wheel buttons

Power figures:

• 392WHP on 99RON pump fuel

• 540WHP on E80 flex fuel mapping

───

Drivetrain

• Kotouc 7-speed sequential gearbox

(Aircraft-grade billet construction, rated to 1400nm of torque)

• Kotouc GR Yaris Street package

• Carbon fibre gear lever with integrated strain gauge

• Reverse lockout release trigger

• Adjustable billet shifter frame

• Gear display indicator mounted under media unit

• Kotouc externally adjustable front LSD

• ATS twin-plate carbon clutch

• Cusco RS 1.5/2-way (switchable) rear LSD

• Brena Racing correct ratio crownwheel & pinion

• Syvecs 4WD controller - Professionally mapped on uncoupled 4WD dyno by Ryan at Syvecs

The drivetrain setup allows a genuine locked 50:50 torque split and transforms the way the car handles, while also limiting any slip and extending the lifespan of the factory ITCC system.

───

Suspension & Chassis

• KW V3 coilovers

• Upgraded 250mm/61mm ID 50n/mm springs with Clubsport top mounts

• Original KW springs included

• Cusco anti-roll bars

• Cusco strut braces

• Cusco adjustable control arms

• Cusco pillow-ball bushes throughout

• Hardrace spherical front bushings

• SW Motorsport rear chassis brace

• Powerflex upper & lower engine/gearbox inserts

• Full suspension geometry and corner weighting setup by String Theory Garage.

The car sits close to OEM ride height while offering significantly improved handling capability and excellent composure whilst assuring good ground clearance.

The car has also received powder coating to various underbody and suspension components, including the subframes, for improved durability against UK weather conditions.

───

Brakes

Front:

• Garage Whifbitz/AP Racing 362mm big brake kit with AP Racing CP7040 forged 6-pot calipers and AP Racing 362mm J-hook discs

Rear:

• Garage Whifbitz/AP Racing 330mm big brake kit with AP Racing CP3215 forged 4-pot calipers and AP Racing 330mm J-hook discs

Additional braking upgrades:

• Porterfield R4S pads front & rear

• Goodridge braided brake lines

• Anodised black bells & mounting hardware throughout

───

Bodywork & Exterior

• Garage Whifbitz M-Style carbon bonnet

• RSIC6 carbon vented front fenders

• RSIC6 carbon front splitter

• RSIC6 carbon side skirts

• Koshi full carbon rear diffuser

• Pandem Rocket Bunny rear wing colour match to body and support struts in gloss black

• BFM vented rear bumper

• Phoenix Composites custom carbon front badge intake

• Toyota wind deflectors

• Axis Parts Japan carbon vortex generator

• Axis Parts Japan carbon fuel cap cover

• Axis Parts Japan carbon upper duct covers

• Axis Parts Japan carbon mud flaps

• Axis Parts Japan carbon boot step guard

• Axis Parts Japan carbon window mould covers

• Axis Parts Japan carbon wing mirror covers

• Original vinyl roof wrap removed, carbon and replaced with STEK carbon pattern PPF

• GR badges have protective vinyl applied in green and red with white GR text - easily removed if needed

• Zunsport front grille set

• Automotive Passion black badge set

• Cusco front tow eye

The car has been used and has normal wear and tear on the paintwork.

Protected with a full 5 year ceramic coating package.

───

Interior

• Custom Alcantara dashboard & door trim

• STG Alcantara steering wheel

• Phoenix Composites carbon steering wheel trims, media surround & handbrake lever with fly off function.

• Axis Parts Japan carbon window switch covers

• HKS front and rear floor mats & boot mat

• Custom GR heel/toe plate

• SW Motorsport driver static seat lowering frame - Original driver seat rails included

Audio system professionally upgraded by SJ Concepts:

• Phoenix Gold amplifier

• Phoenix Gold ZR speakers

• Hidden Phoenix gold subwoofer installation under boot floor

• Lightweight sound deadening under carpets and in door panels

• Wireless Android auto/ Apple car play

• Qi2 Magnetic Wireless phone charging mount

Also fitted with:

• SW Motorsport extinguisher bracket

• Firexo extinguisher

• NOCO Genius hard-wired battery charger/conditioner with 3-pin plug connector mounted in boot

───

Wheels

• Enkei RS05RR 18x9 ET35 wheels in gunmetal

• Enkei duralumin locking wheel nuts

• Yokohama Advan A052 tyres fitted

───

Security includes:

• Thatcham-approved immobiliser

• Remote ignition cut-off

• S5 tracker system with 24/7 monitoring, live tracking and alerts

───

Mileage

• Chassis mileage: 45,148 miles

• Engine build, gearbox and majority of major drivetrain and suspension components have covered approximately 16,700 miles

───

Serviced 420 miles ago at Garage Whifbitz:

• Engine oil and filter

• Gearbox oil

• Spark plugs

• Air filter cleaned

───

Summary

This represents a rare opportunity to acquire one of the highest-specification GR Yaris builds in the UK, professionally engineered using exceptional components throughout and maintained to an uncompromising standard.

The car combines supercar-killer performance with genuine road usability, retaining a full interior, upgraded audio system, climate control and excellent motorway manners. Every aspect of the build has been carefully considered, with reliability and drivability given equal importance to outright performance.

This is not a freshly completed build being sold immediately after completion. The current engine build, gearbox and major drivetrain components have covered approximately 16,700 miles and the car has proven itself to be both reliable and usable in real-world driving.

The build has been carried out by some of the most respected names within the GR Yaris community, including Garage Whifbitz, SpecJ Motorsport and String Theory Garage, with extensive documentation available to support the car's history and specification.

The cost to purchase and replicate this build today would comfortably exceed the asking price.

Sale is reluctantly due to ongoing health issues and to help fund further treatment.

MOT until June 2027 with no advisories.

Registration "MY03 POT" included in the sale.

Paperwork, invoices, dyno graphs and build history available.

Serious enquiries only.