AFE: MACH Force-Xp 3-1/2" 304 Stainless Steel Muffler-Delete Cat-Back Exhaust System BMW X5 M (F85) / X6 M (F86) 15-19 V8-4.4L (tt) S63 guides 9L Gas 1979-1979 Dodge D-Series

9L Gas 1979-1979 Dodge D-Series 4 Bbl V8 5

LT1 camshaft bolts

7L Diesel 2007-2012 Dodge 3500 Cummins Turbo Diesel L6 6

the difference is in low end drivability

8L Gas 1999-2007 GMC Sierra V8 5

AFE: MACH Force-Xp 3-1/2" 304 Stainless Steel Muffler-Delete Cat-Back Exhaust System BMW X5 M (F85) / X6 M (F86) 15-19 V8-4.4L (tt) S63 guides 9L Gas 1979-1979 Dodge D-SeriesAdd power, sound and unique style to your BMW X5 X6 M with this aFe Power cat back system which produced gains of up to +15 horsepower and +23 lbs. x ft. torque as measured on our in house dyno. Dual 3" to 2 1 2" mandrel bent, TIG welded, brush finished 304 stainless steel tubing keeps exhaust flowing smoothly for power gains you can feel. The factory exhaust valve motor is used to regulate the exhaust flow from a closed valve, aggressive tone to wide