Quiet/Deep axle back exhaust options
 

So I plan to get a MY15 and don't like how quiet the stock exhaust sound is and i want a deeper sound than stock not necessarily louder but I"m sure they come deep and louder. Anyway any suggestions on an axle back or maybe even a cat back with a deeper sound slightly louder than stock is okay since it will be my DD I don't want to have ear trauma for as long as i own the car. I know i will only get a certain amount of deep sound out of an H4 but gonna try.
thanks!

I have had the Greddy SP Elite for a couple years now and the sound is great. I think the exhaust by itself will give you what you are looking for. Mine is mated to a Revworks UEL Header and Motiv Concepts over pipe and down pipe so it is quite a bit louder.

Just installed a nameless 5" muffler 4" tip axle back on my otherwise stock system. Sounds great. At idle it isn't any louder than stock, cruising it's JUST loud enough to hear inside the car. Cold start/WOT is louder than stock but not by much.

(Disclaimer: all these "readings" are done inside the car. I have no idea what outside sounds like").

Maybe I should hook the go pro up and see what it sounds like from behind the car

Personally I think you are starting on the wrong end of the exhaust. Do you have plans for future modifications? Do you want more HP than stock? If so, probably the best bang for the buck mod is a set of catless headers and a tune. Both of which can be had for less than the cost of a decent catback exhaust. This also had the added benefit of getting you that increased exhaust sound you want. Changing the headers out for a catless UEL header will get you that boxer rumble you want at a volume that isn't annoying as crap as a DD.

Get the OFH (open flash header) and OFT (open flash tuner) combo package, flash stage 2 on your car, call it a day. http://openflashtablet.com/products/OFH/index.html

Loving the sound of my Greddy SP Elite, once it was broken in. Calm while cruising but will growl pretty good when you get into the throttle. You can always add an over pipe and/or headers if it's not loud enough for you. I haven't since I usually leave for work at 4:30 am and don't want to piss off the neighbors.

Zeta performance. Full stainless cat back that's very very deep and mature for around 450 shipped. NO COMPARISON.

aAs @Malt says if you want a performance increase then change headers catless headers will give performance increase and also increase in sound level, you will need a tune for max benfit though and to stop cel code due no cat. you can get a small fitting for 2nd o2 sensor to eliminate cel without tune.
If you just want sound then axle back is fine and is far less likely to get you in any warantee dramas than changing headers and you can swap it out in 10 minutes.

For quietness and a deep note the HKS LEGAMAX PREMIUM is available as an axleback.

I have one is not cheap but its very quiet no drone , the sound level is only 1 or 2 dB above stock but a very deep pleasing note thats never offnsive even at 7000 rpm.

Its much quieter than perrin or namless.

It probably to quiet for some and the 5" tips take some getting used to :)

I just ordered the Greddy SP Elite....nice deep tone, no raspyness.

I've got the tsudo catback and it is barely louder than stock with a nice deep tone.