A heavily modified and exciting modern classic performance coupe, this Nissan Skyline R31 is a potent rear-wheel-drive machine. Under the bonnet is a heavily modified Series 2 RB25DET Stagea 2.5-litre turbocharged inline-six engine, sending 245rwkw (329hp) to the rear wheels via a rebuilt five-speed manual transmission. The odometer shows 23,000 km, though this is not warranted. The replacement engine has reportedly covered 112,000 km since being overhauled. The car is finished in Red over a Grey interior, featuring Recaro confetti LX seats with fishnet headrests and a Momo Prototipo steering wheel. It rides on 16x8.5 Image Wheels RM2s, fitted with 225/50 Bridgestone Potenza RE003 tyres. Also included in the sale are a set of 17x8.5 Enkei PF07s on 245/45 Bridgestone Potenza RE003 tyres. Modifications include: an Angry Industries front lower lip, a genuine GTS-R rear spoiler, a new front bumper with fibreglass vents, a new windscreen, and titanium valve caps. The interior features a R33 leather shift knob, Fitmint Auto floor mats, and a Kenwood head unit with 6x9 speakers. The substantial list of further upgrades comprises: Series 2 RB25DET Stagea engine with Tomei baffled oil pan, Franklin engineering head drain kit, ACL big-end bearings, skimmed head, Tomei 1.5mm MLS head gasket, ARP head studs, Gates racing water pump and timing belt, Mishimoto intercooler, new genuine Nissan 3 Core radiator, custom stainless 3-inch exhaust, Hypergear mild SS1 hi-flow turbocharger, A'Pexi Power FC ECU tuned to 245rwkw@15psi, Greddy Profec B Spec-II boost controller, Walbro 255 fuel pump, Nismo 555cc injectors, Splitfires, Apex'i pod, carbon fibre timing belt and valley covers, and a Lithiumax 450CCA Lipo battery. The drivetrain features a rebuilt RB25DET gearbox with short shift kit, RBFactory gearbox cross member, new clutch master and GK-Tech braided line, Exedy cushioned button ceramic single plate clutch, Exedy lightweight flywheel, custom single-piece tailshaft, R33 GTS-T Skyline rear subframe conversion, S15 Silvia 3.69 helical LSD, and DMAX strengthened drive shaft set. Suspension and braking upgrades include BC Racing coilovers, R32 GTR front and rear brakes with slotted front rotors and Ferodo DS2500 pads, new S14 Silvia front hubs, Whiteline strut brace, and Whiteline adjustable front and rear swaybars, adjustable castor rods, rear traction rods, and camber arms. The seller states that the car is accompanied by two keys and remotes, an R31 Skyline Silhouette steering wheel, projector headlights (currently disassembled for restoration), a late model GTS-X grille and filler panel (already painted), windscreen trims, components for reinstalling air conditioning, the stock RB25 turbo and ECU, and a Silvia differential with 4.3 ratio and axles. Please refer to the photo gallery to assess the exterior and interior condition. Specific notes from the seller include: various paint chips, marks and scratches around the bodywork, and a spot of rust under the weather seal in the boot. The seller states that the most recent maintenance was in March 2026 at an indicated 22,872 km. This reportedly included engine oil and filter, brake fluid, and spark plugs. The Nissan Skyline R31 represents a distinctive era of Japanese performance, offering a blend of classic styling and robust engineering. This particular example has been extensively and thoughtfully modified, featuring a Series 2 RB25DET Stagea engine, a rebuilt five-speed manual gearbox, and a comprehensive suite of suspension and brake upgrades. With its bespoke features and unique aesthetic, this Skyline R31 would make an engaging companion for enthusiasts seeking a highly capable and individual modern classic.