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In all production G8s, a basic oil and air strut is standard. The Pedders strut is a nitrogen-charged gas and oil damper. The gas and oil work to provide a more controlled response to road imperfections. Every Pedders strut is pressure-tested before it leaves the assembly line. Typical OE and aftermarket coils are wound to a height tolerance of 15 mm; Pedders' coils are wound to a tolerance of 2 mm. Ride heights are measured on every Pedders coil before they're put into a box for retail sale. The spring rate is 30 percent stiffer than stock.