Bass shakers, haptic transducers and full motion platforms that let you feel the car.
Haptic transducers bolt to your seat or pedals and turn telemetry into vibration: kerbs, gear shifts, wheel slip and engine revs. They're the most affordable way to add immersion.
Motion platforms physically move the rig for pitch, roll and traction loss. They cost more and need a rigid, compatible frame, so they unlock once your build has a rig.
A single bass shaker starts around €60–€100 and needs an amplifier, which some kits include and others sell separately. Full motion platforms start in the thousands and draw significant power, so check the platform's electrical requirements against your setup before ordering.