Grail BMW M3/M4 OPF Back Exhaust System (G80/G81/G82/G83)The Grail stainless steel upgraded exhaust system for the BMW G80, G81, G82 and G83 M3 and M4 vehicles produces an incredible sound. The Grail system transforms the driving experience of the S58 powered M3 and M4. Gone is the strangled rasp of the factory system not to mention the sizeable weight saving! This exhaust system is an OPF back, retaining the car's primary and secondary catalytic converters in place, as well as the OPF on UK EU cars. If you
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Grail BMW M3/M4 OPF Back Exhaust System (G80/G81/G82/G83)