I guess I've never done a comparison test between the two. I know I'm not losing anything with it though. The one thing that I find really neat is how people look and point or comment about small animals crawling up inside.
Seriously though, the tail pipe has the most bends so giving things a bit more room sure doesn't hurt...
I would say that if the user was using the basic power programmer device, the 5" exhaust would shift the torque curve farther to the right and be more peaky, and maybe increase peak horsepower just a bit. However, the average hp and tq figures might even be lower unless you've got substantially more power (like with intercooler and turbo upgrade along with all the basic intake / exhuast upgrades). Just my $0.10 worth.
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