Installed the z1 headers this weekend, the install isn't so bad. Jacking up the motor and removing the steering shaft on the drivers side makes it alot easier. I wrapped them in high temp exhaust wrap,and did the test pipes too. The tone isnt drastically different than the factory headers but there is a noticeable change. I wouldn't really day its louder though. I haven't driven the car enough to do a real driving impression, but I will say that driving around town the mid range seems to have improved, I suspect the biggest gains are up top though.
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