I was originally going to go with the Solo V8 axle back and the Magnaflow True X. This is what Joe LaBruzza from G8Only recommended. He said they sounded way better than the V6 axle backs.
What I ended up doing though was installing the Magnaflow True X and a Magnaflow axle back. I bought both used but in like new condition. I'm assuming the axle backs are for a GT because the guy who owned them had a GT. They also have dual tips. Anyways, that was the ticket for me because it sounds incredible on my V6.
Magnaflows are 630 new. I got these for 145 bucks. The X was 80, normally about 125. Total cost...225 installed. I work at a automotive repair facility so no labor.
Disregard the GT emblem. I own a base model.
Love the sound and look.