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Built-in Internal/External Fins: Built-in internal and external fins transfer heat from the oil to the outside air for maximum cooling
Often specified as original equipment
Equal length tubes mean the scavenging effect happens evenly across all four cylinders
STI 2004-2021
aFe 20-22 Audi RS6 Avant V8 4L (tt) MACH Force-Xp 3in to 2.5in 304 SS Cat-Back Exhaust w/ Carbon Tip Width_8" Built-in Internal/External Fins: Built-in internalThis cat back exhaust system is constructed of 3 IN 2 1 2 IN mandrel bent brushed finished 304 stainless steel tubing for maximum strength and durability. This system features high flow 304 stainless steel mufflers, producing a deep sound. Finishing off this exhaust system are quad 3 1 2 IN diameter carbon fiber 304 stainless steel clamp on exhaust tips. The tips features an aFe POWER logo for a unique style. This system produces a deep sound
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