aFe MACH Force-Xp 3.5in 304 SS Cat-Back w/Polished Tips 15-18 BMW X5 M (F85)/X6 M (F86) V8-4.4L S63Add power, sound and unique style to your BMW X5 X6 M with this cat back system which produced gains of up to +20 horsepower and +33 lbs. x ft. torque as measured on our in house dyno. Dual 3" to 2 1 2" mandrel bent, brush finished 304 stainless steel tubing keeps exhaust flowing smoothly for power gains you can feel. Designed with a transverse, high flow muffler finished in high temp powder coating for long lasting good looks and unique sound. The

Our unique billet aluminum CNC machined end tanks are set up as dual-pass for the C7 S6

8T 2WD 3 & 5 door 1996 to 2004

34-21-9-811-539 / 34 21 9 811 539

a bit more expensive but provides more rounded shapes for better airflow

and you are ready to roll

0 liter engines had 12 point head bolts

Avoid heatsoak by replacing the small factory cooler

11-31-7-502-048 / 11 31 7 502 048 / 11317502048

this adaptor has a stainless steel sleeve in the adaptor neck for added rigidity

Ideal for saloon race cars or rally cars

creating high product stiffness that also leads to extra strength

Single Side Touring Edition Exhaust -- two tips