Custom-tailored tuning. No compromises.
At 4motors, we don't install random parts hoping for a good result. We approach modifications with an engineering and comprehensive mindset. We listen to what the car will be used for – whether it's fast street driving, track days, or 1/4 mile drag racing – and we analyze the stock potential of the base car. From precise Stage 1 tunes to building forged monsters with sequential gearboxes. We build setups that deliver brutal performance, but above all – the reliability we are known for.
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Engine
We are masters of engine assembly. Forged internals, precise machining, cylinder head porting, and the perfect selection of turbochargers tailored to the torque curve. We build hearts that withstand extreme boost levels, do not overheat, and do not fail during hard track driving.
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Electronics
The brain of the operation, where there is no room for error. We handle everything – from designing and building custom wiring harnesses, through the installation of advanced ECUs, to top-tier dyno tuning for specific fuels and track conditions.
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Drivetrain
Transferring power to the tarmac is our element. We install and service sequential gearboxes. We select and precisely adjust Limited Slip Differentials (LSD) so the car grips in every corner. We install reinforced transfer cases, heavy-duty driveshafts, and axles that won't shred during an aggressive launch control procedure.
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Brakes
The car must brake just as brutally as it accelerates. We service braking systems at every level: from racing fluid, pads, and braided lines, to designing fully custom Big Brake Kits.
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Suspension
We have immense knowledge of kinematics and suspension operation in motorsport. We precisely select components and tune shock absorber stiffness and bump settings. We dial in an aggressive, sports alignment geometry, so the car stops fighting the driver and starts listening to the steering wheel.
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Exhaust systems
Sound is just a nice addition; on the track, maximum exhaust flow and thermal management are what matter. We install dedicated systems from top manufacturers, but our true strength is custom fabrication. We design and TIG weld complete exhaust systems, downpipes, and manifolds from scratch. We work with the highest quality stainless steel and ultra-lightweight titanium.