I bought them for my Crossfire, and I am going to use them in the winter because it gets so cold here St. Louis. It helps the engine get a little warmer just a little faster, and they sound fantastic. I wouldn't run them in the summer though, way too much heat. They also look fantastic. I am probably going to swap them out with a specter cone, the stock cones are pretty but they do not stand up very well.

Over all, if you are looking for a short-ram for sound and getting the engine warmer faster, these are absolutely the cheapest. I got them at around $110 bucks shipped. I honestly wouldn't buy them if you are looking for serious performance. I have a little increased throttle response and no increased horsepower it feels.

If ANYTHING, they look absolutely fantastic and you get two of them, with awesome fittings for only $110.

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So, to sumarize. Horrible performance upgrade, great sound/bling upgrade.