For BMW 325 E90 catback SUS304 Variable Exhaust Valve with Controller Dual-side 4 Outlet Exhaust

Engineered for the BMW 325 E90 featuring a dual-side 4 outlet layout, this SUS304 stainless steel catback exhaust adopts premium TIG hand welding and 1:1 OEM replication for seamless bolt-on installation with zero vehicle modifications. Constructed with high-purity food-grade SUS304 stainless steel, the exhaust boasts outstanding resistance to high temperatures up to 900℃, corrosion and thermal fatigue, effectively preventing rust, deformation and cracking for long-lasting service life with low maintenance. Fitted with an IP68 waterproof and IK07 shockproof wireless variable valve controller, it delivers customizable exhaust sound: a quiet stock tone for daily commuting and cruising, and an aggressive crisp resonant exhaust note to unleash engine power for track use, optimizing exhaust flow and enhancing throttle response. Premium TIG hand welding eliminates weld pores, air leakage and resonance noise for superior structural tightness and durability. Precision OEM mold design perfectly matches original chassis structure and dual-side four-outlet mounting points, preserving stock ground clearance for daily driving and vehicle inspection. Rigorously tested for pressure, sound and welding quality, this reliable aftermarket exhaust offers stable valve operation, excellent durability and cost-effective performance upgrades for BMW 325 E90 owners.