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By removing the restrictive factory resonator
The AST Lowering Springs for BMW 4 430D (07/2013-10/2020) are precision-engineered components designed to enhance your vehicle’s driving dynamics by lowering the center of gravity while maintaining a high level of comfort
Designed for BMW F20/F21 M135i
5 B38 petrol (2019+)
- MMX laser-etched logo
Supersprint Alpina G20 B3, G21 B3 & G26 B4 Stainless Steel Front Exhaust - Resonated (Deletes the Secondary Catalytics) M3 (E92 | E93)(P) By removing the restrictive factoryThe Supersprint Front Exhaust Resonated (Deletes the Secondary Catalytics) is a precision, direct fit stainless steel upgrade engineered for the Alpina G20 B3, G21 B3 & G26 B4. It replaces the restrictive factory component to free up exhaust flow, sharpen throttle response and give your Alpina a deeper, more purposeful note. Supersprint has been handcrafting performance exhausts in Mantova, Italy since 1955. Every system is designed and validated on
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