Akrapovic 2021+ BMW G87 M2, G80 M3 & G82 M4 Evolution Short Link pipe w/o Resonator (Titanium)Constructed from high grade titanium, the link pipe is shorter, allowing the secondary stock catalytic converters to remain on the car. Combined with a Slip On Line (Titanium) and delivering a deep, rich, and sporty sound without drone, it totally embraces the pure turbocharged inline six cylinder sound. Remapping is mandatory. This product is meant for racetrack use and closed courses only. This product fits only on NON OPF vehicles. THIS PRODUCT