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Their precise engineering and robust construction make them a trusted choice for professionals and enthusiasts alike
The rigid construction enhances durability while reinforcing a modern
Each purchase includes a pair of ducts
The inlets themselves are up to 160% larger in cross-sectional area than stock and are designed with an advanced dimpled inner surface to reduce frictional losses between the flow and the wall boundary
HARDRACE BMW M5 F10 F20 F21 F22 F23 F30 F31 F32 F33 F34 F36 Replacement Bushing For #7721/#8870 - RP-7721-SB M140i F20 Their precise engineering and robustThe HARDRACE Replacement Bushing For #7721 #8870 (part no. RP 7721 SB) is a direct fit, performance upgrade over the OEM part for the BMW 5 Series M5 (F10), BMW 1 Series (F20), BMW 1 Series (F21) and other models. Precision engineered to tighten suspension geometry, sharpen steering response and improve durability under hard road and track use. Built to a higher standard than the OEM component, it delivers a measurable improvement in feel, longevity,
