For those that read my other thread regarding my Mangaflow exhaust install, and recall my disappointment in sound and initial performance...I decided to update with some numbers. Before I installed the exhaust, I made ten 0-60 runs on the freeway. Right after install I decided to hell with it, and didn't feel the need to make post-install runs.
However, after doing my daily commute this week, I actually started noticing the GC, even when in Eco mode, didn't feel as sluggish. Maybe the computer had time to learn the new exhaust?
Just to see if it was in my head, I went and replicated the exact same runs I did before the install. Granted, I don't have scientific data recorders. I simply used my phone with a performance app, so take the numbers however you want. In short, I'm quite surprised. In performance/sport mode, the GC actually broke traction once, and the initial launch was noticeably more forceful.
I averaged about 9 seconds 0-60 before the install. (On 20" wheels 33" A/T tires.) my best run was in the mid 8s. After the install, as you see in the pics, I averaged low 8s and broke into the 7 seconds a couple times with a best of 7.65. The post install gained almost a full second on 0-60 times. I find it hard to believe myself, but I was there...so it is what it is.
Red numbers are stock, blue numbers are after the exhaust install. You can also see in one pic that the lateral acceleration G's increased which explains the difference I was feeling at launch.
I will let everyone form their own opinions and discuss. As for me, I'm still disappointed that removing the exhaust nets zero difference in sound, but I am impressed with the performance, even in everyday drivability. I'm still unsure it's worth $1400. I'll leave that up to everyone else to decide, as I am not advocating one way or the other....just sharing my experience, FWIW.