KYOSTAR Valved Sport CatBack Exhaust System for BMW F30 F31 B48 2.0T Engine The KYOSTAR Valved Sport CatBack Exhaust System is designed specifically for 2015-2018 BMW F30 and F31 320i/330i models equipped with the B48 2.0T engine. Featuring a valved exhaust design and M3-style dual-tip appearance, this system improves exhaust flow while providing adjustable exhaust sound for both daily driving and performance applications. Constructed from durable stainless steel with