Ive read through alot of threads about exhaust, cant seem to find one that mentioned anything about the stock mazdaspeed exhaust. Just wanting to know if there is a muffler or if there are only resonators in the stock exhaust system? Ive heard only resonators....



Also wondering why there are plug on the back side of the headlamps, i have one on each of the headlamps both connectors are capped off...car only has normal bulbs, noticed the connectors when i swapped em for the silverstar ultras

 

I would think there's at least one muffler in there.
The plugs are actually caps that can be removed using a screwdriver to adjust the headlamp beams.