Exhaust Cutouts

I've heard mixed things about the Summit ones.

http://www.summitracing.com/parts/qtp-qtec60cp/overview/

These are a bit more pricey but they look like they'd last a long time. Hot Rod wrote an article on them and had good things to say. Here's a link if any of you are interested

http://www.hotrod.com/techarticles/hrdp_1204_hot_rod_proven_qtp_exhaust_cutouts/