Straight pipes to Corsa extreme exhaust?

[efnfast]

Right now my setup is stock manifolds, lethal off-road H and magnaflow competition exhaust (straight pipes)

I love loud - my 65 cobra has a built 408 w/ massive cam; my Z06 is longtubes straight pipes, etc. - but this setup is starting to get on my nerves, I think because of how loud it is and the raspy pitch of it.

I love how it sounds over 3K RPM and all of the decel popping it makes at any RPM when I let off the gas. And going through tunnels!

I don't like how at 2K RPM it makes a horrible loud rasp, cruising on the highway is either 6th gear drone or loud 5th gear rawwwwr, and at certain RPM it sounds more like a pickup truck w/ a broken muffler.

Has anybody gone from straight pipes to Corsa extrmes? if so, how's the decel popping rasp and overall loudness? I was reading some threads where people say extremes are loud, and others saying extremes are too quiet.

 

[2011 gtcs]

Corsa xtremes are the way to go, the magnaflow muffler delete axle back sounds like shit IMO unless you're running the stock mid pipes.
Here's my old setup, ARH headers/OFR H-pipe and corsa xtremes

 

[efnfast]

Do you get a lot of decel popping with the corsas - hard to tell from the video.

 

[2011 gtcs]

Do you get a lot of decel popping with the corsas - hard to tell from the video.

That more depends on your tune, not your exhaust.

 

[Jam421]

Given you have an H-Pipe different mufflers might help the raspy sound. Regarding the quite common deccel popping which many guys like ....Lund advised me that's a product of custom tune + free flowing exhaust where unburned fuel ignites and pops . They corrected it by tweaking my tune with "Hang Timing". This adds a bit of timing only on deccel until the car returns to idle. I can now deccel thru a gear from any rpm and popping is gone. The only drawback is when rolling up on a light or intersection the idle stays up around 12-1300 as I'm free rolling in...then within 5 seconds it drops to 950rpm idle. On a highway I feel no consequences of this tune tweak when I lift off the gas.

 

[efnfast]

Ordered a set of Corsa Xremes and finally got around to installing them. I can definitely now say that straight pipes (off-road H w/ Magnaflow Competition) sound like shit on the 5.8.

Setup is still oem manifolds with lethal off-road H pipe.

Fitment
Magnaflow fitment was horrible. The passenger side fit but I spent 5hrs on the driver side and it fit like shit; I'm certain the hangers are welded in the wrong spot and have to be re-welded. Corsa's fit perfectly on both sides with minimal effort (I was surprised given the directions say they're only for a 13/14 GT ... guess exhaust fitment is the same)

Idle
Magnaflow are loud but high pitched and always gave me a headache. Corsa's are perfect but not high pitched, no headache.

Cruising
Mangnaflow is horrible drone unless you keep the rpm at/beneath 1,600RPM (in which case you're out of gear and can't do anything). Corsa's have no drone, just loud exhaust bark

Low RPM (<2500)
Magnaflow sound like a broken pickup truck with a horrible (horrible, even though I'm using H and not X pipe) rasp at 2,000 RPM. Corsa's sound perfect ... loud muscle car sound, no rasp at 2,000 RPM, but exhaust bark

Medium/High rpm (>2500)
Both are awesome

Decel Popping
I'm pretty sure I lost a little bit of down-low decel popping with the Corsas, but at medium/higher rpm it's still there, so Magnaflow slightly better in this regard I think.

Conclusion - I love loud but pure straight pipes on a 5.8 sound like shit.

edit: I've got nothing against Magnaflow ... love the setup on my 04 cobra ... it's not their fault straight pipes sound like shit on the 5.8