Quote:
Originally Posted by churchx
norcalpb: oem one is parachute depending on what catback is used, as it works together with catback-s muffler. If there are different shaped aftermarket mufflers, eg. longitudinally placed or at angle, then they would benefit from extra diffuser or in general some aero element to to direct flow around stock bumper cover's edge.
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He said the OEM muffler. Your reading comprehension skills need a tune up.