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View Full Version : old HM muffler design - do they restrict airflow in anyway



etrocket
28-02-2012, 09:49 PM
hey guys,

not sure if this has been discussed, but I have a HM 2.5" stainless catback. The mufflers have twin outlets but only one vents gases (80-90%). Would there be any advantage going to their newer design which uses both. i believe the outlets on the mufflers are also bigger which is what I'm after.

SSVHM2.5
29-02-2012, 07:48 PM
I have the same one and I think the sound is a little lawn mower like at low revs but it makes good power on the dyno. Not sure about the new units though....