2025 Ultima RS - LT5 Engine

KEY FACTS

• A captivating and immensely powerful Ultima RS, a modern track-focused supercar with extreme performance.
• It is powered by a Katech-tuned 6.2-litre LT5 Chevrolet V8, producing 1,000bhp, driving the rear wheels via a Porsche 997 Turbo six-speed manual transmission with a limited-slip differential.
• First registered in 2025, this UK-delivered example has reportedly had one owner from new.
• The odometer displays 700 miles.

EQUIPMENT AND FEATURES

• The car is finished in orange over a black leather and synthetic suede-trimmed cabin, punctuated by orange stitching.
• It rides on a set of black forged 19-inch alloy wheels, housing red callipers and fitted with Michelin tyres.
• This Ultima RS is a highly specified example, reportedly equipped with all available factory options as well as a professionally tuned 1,000bhp engine.
• The car is accompanied by a new unused set of Gun Metal alloy wheels with unused Pilot Sport Cup 2 Tyres, a full digital library of the car’s build, various paperwork and manuals, spare parts from Ultima reportedly worth over £8,000 worth. Service parts for the engine including oil, filters, gearbox oil, and coolant, an unsued bespoke Ultima luggage set

Specification:

• Modifications and sign-off by Steve Smith and MacG Racing - both Ultima specialists
• Engine Katech Tuned LT5 1000 on Dyn0
• 1,000hp Pump Gas Track Attack Upgrade 11,325.32 11,325.32
• Katech CNC LT5 Supercharger
• Katech 112mm Throttlebody
• Katech Spintron Validated Valvetrain
• Katech LT5 Specific Camshaft
• Katech Tool Steel Spring Retainers
• Katech Tool Steel Spring Locators
• PSI 1516 Valve Springs
• Tool Steel VVT Lockout
• ARP Head Studs
• New GM VVT Phaser Bolt
• New GM LT5 Head Gaskets
• Trend 3/8-0.080 Hardened Pushrods
• Katech CNC Cylinder Head Ports
• Katech CNC Cylinder Head Chambers
• Katech Competition 5 Angle Valve Job
• Katech Hand Blending
• Katech Flat Sand Deck Surface + Deburr
• Service
• ATI Lower Damper
• ATI Lower Supercharger Pulley
• Griptec Upper Supercharger Pulley Hub
• Griptec Upper Supercharger Pulley
• Gates HD Belt
• Katech CNC LT Oil Pump
• Katech Motorsport Wires
• Katech Wire Insulator Sleeves
• Brisk Racing Spark Plugs
• Porsche 997 Turbo 97.50 six-speed manual transmission with limited-slip differential
• Ultima RS hydraulic lift kit for front ride height
• RS rear wing in carbon fibre - full car width 1780mm double element design, with 9 different angle of attack adjustment positions, starting at -2degs up to a max of +14degs; and the wing is mounted on anodized black bespoke swan neck mounts which transfer downforce directly to the chassis
• RS carbon-fibre sill cover tops with carbon-fibre infill lids
• RS curved carbon-fibre wing end plates
• RS carbon-fibre chassis-mounted front splitter with vortex generators
• RS carbon-fibre wheel arch louvres
• RS carbon fibre large rear diffuser
• RS carbon-fibre side skirts
• RS side pod brake duct exits - pair
• RS radiator exit divider to initiate air flow separation when using roof scoop
• RS roof scoop Le Mans style designed in the wind tunnel AC unit
• Grey anodised front tow hook
• AP Racing 362mm curved vane discs with 6-pot callipers
• LED latest generation bespoke Ultima RS front and rear light clusters
• AIM Digital Dashboard
• Nitron dampers
• Heated windscreen
• Carbon-fibre centre cockpit console
• Alpine iLX Head Unit built into dash with Alpine rear view camera and 6 Speaker Set up
• Perfectly balanced corner weights and ‘fast road’ alignment
• High-flow catalytic converters for low emissions
• Ceramic exhaust heat containment coating in silver colour
• Sports X Pipe also Silencer box supplied interchangeable
• Heat shielding to all Header pipes
• Motion Raceworks Billet Engine Oil Catch can & breather
• Set up and check over with MacG Racing and Steve Smith
• PES Electronic door locks (not fitted yet)
• Scorpion Track Immobiliser and Tracker

CONDITION

• Please refer to the photo gallery to assess exterior and interior condition.

SERVICE HISTORY

• The seller reports that the car was last serviced in October 2025 at 700 miles by the owner, who refreshed the engine oil and filter.

SUMMARY

The Ultima RS is a bespoke, track-focused supercar known for its incredible performance and raw driving experience. This example stands out with its comprehensive specification, including every available factory option and a professionally tuned 1,000bhp Katech LT5 V8 engine, making it a truly formidable machine. With only 700 miles on the odometer since its registration in 2025, this Ultima RS offers its next enthusiast owner an unparalleled opportunity to acquire a virtually new, extreme performance car, ready to dominate on the track or thrill on the open road.

Descriptions are provided by the seller and, to their knowledge, are accurate and not misleading. Buyers must satisfy themselves of the description’s accuracy, and independent research is strongly advised. Enquiries should be raised in the comments section and any inspections arranged before bidding.

Classic and collectible vehicles may have had cosmetic or bodywork repairs that are not visually apparent. Photographs may not accurately reflect colour or condition, so buyers should confirm key details directly with the seller. Unless stated otherwise, you must assume that any cherished, personalised, or heritage vehicle registration is not included in the sale of a car or bike. Please see our Terms and Conditions for full details.

All UK-registered cars and motorbikes on Collecting Cars are run through an online HPI check. On the HPI report, this vehicle shows no insurance database markers for damage or theft. It is currently covered by a finance agreement.