$750.00
The SP Motorsports Performance Spring Kit includes four main and four helper springs to increase chassis stiffness. These Porsche GT4 springs directly fit the factory damper assembly without requiring re-valving. The factory springs measure approximately 45 N/mm front and 80 N/mm rear. These softer rates can create slower front-end response during aggressive driving and cornering.
Choose between our Standard and EVO spring kits to match your driving style and setup. The Standard kit uses 79 N/mm front springs and 98 N/mm rear springs. The EVO kit uses 118 N/mm front springs and 137 N/mm rear springs. Both kits improve chassis response while maintaining compatibility with the factory dampers.
These springs work especially well with smaller wheels, lowered ride heights, or increased aerodynamic downforce. The result is a more responsive and controlled GT4 without requiring a complete suspension overhaul.
Model Fitment:
