aFe 3.5in SS Cat-Back Exhaust w/ Black Tip | BMW X5 M (F85)/X6 M (F86) V8-4.4L (15-18) (49-36342-B) Air Intakes Knowing the exact air/fuel mixture

Knowing the exact air/fuel mixture running through your engine is the most important factor to extracting the highest levels of performance and durability

Please note that this product is intended for off-road use only and should be installed by a qualified technician to ensure proper fitment and safety

Its robust construction helps prevent stripping and cross-threading

with a relaxed cut suitable for most body types

aFe 3.5in SS Cat-Back Exhaust w/ Black Tip | BMW X5 M (F85)/X6 M (F86) V8-4.4L (15-18) (49-36342-B) Air Intakes Knowing the exact air/fuel mixtureMach Force XP 304 SS Cat Back Exhaust System with Quad Rear Exit (49 36342 B) by aFe. Without Muffler. Exhaust System Type: Cat Back. Exhaust Tubing Material: 304 SS. Main Tubing Diameter: 3. 5" to 2. 5". Exhaust System Sound: Aggressive Loud. Get increased exhaust flow, more horsepower and torque, improved performance and lower exhaust gas temperatures with the aFe Mach Force XP Exhaust System. aFe dyno tests every system for maximum gains, and