G8X M3 | M4 Catback Exhaust System w/ Valves Exhaust Tips this diffuser guarantees your X3M

this diffuser guarantees your X3M makes a lasting impression—from every angle

and rattle-free

driving style

Reuses OEM third brake light and inner liner

G8X M3 | M4 Catback Exhaust System w/ Valves Exhaust Tips this diffuser guarantees your X3MG8X M3 M4 Catback Valved Exhaust System Unleash a Deeper, More Aggressive Roar In Stock in Southern California Ships Within 1 2 Business Days Transform your G8X M3 or M4's sound with our 3. 5" Single Mid routed Fully Valved Exhaust. Experience a dramatically deeper, more resonant exhaust note that truly unleashes the S58 engine's potential without having to cut into your factory exhaust. Deeper, More Aggressive Sound: Say goodbye to the muted factory