They can be great. It all depends on the rest of the system the shop builds. If they're going to use cheapo crush-bent tubing, go a little bigger on tubing size because you're putting a bottleneck in at the bends.

I ended up buying an Ark Grip exhaust from the classifieds here. Very happy with them.

I love Magnaflow exhaust systems. I have one on my F150 and I had one on my Mustang. However, I don't think I'm too crazy about the Magnaflow for the Z...it sounds a little off in my opinion.

I'm running the magnaflow catback on my 2011 Z, it sounded "ok" with only the air intakes done,
But now I'm running with headers and hfc's and the magnaflow just wont cut it, lots of rattling and buzing, use to only do it on cold starts now it wont go away,
Gonna order me an Ark set up !!!!!!!!!!!

I'm VERY happy with my Ark GRiP!


Sent from my iPhone using Tapatalk

Go to a reputable exhaust shop and get a custom dual exhaust made. Cost you 300 to 500 and it will perform just like the high dollar ones. just because it's not expensive doesn't mean it won't work.

I've had a magnaflow exhaust on my Rsx and it sounded great. Went through different magnaflow, hks, and greddy exhausts. Most systems, custom or branded, on our cars make similar gains. It all comes down to personal preference.

The only downside to this custom magnaflow setup is that you won't know exactly how it will sound beforehand. But fitment will be spot on since the shop is making it for your car.