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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 11-30-2012, 07:56 AM   #1
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Catless+evolve tune

Hey is anybody running aftermarket headers and no cats with evolve tune for catless? If so can you give me some feedback on performance and does it pop engine light? How much gain from this setup? Thanks
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Old 12-03-2012, 02:10 AM   #2
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I don't but people love the evolve tune on here. If I had headers I would get it without a doubt. Especially with the handheld tuner. That sh1t is awesome. Just get it bro.
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Old 12-03-2012, 04:00 AM   #3
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New York's emissions testing requirements are the same as California, meaning a tail pipe sniffer probe test and OBD II testing to ensure no emissions equipment is disabled or running out of specification. NY like Cali, requires a test bi-annually in order to renew plate tags. Unless you got the hook-up to "buy" your way out of getting a legal test, a cat free M3 will run very dirty thereby failing the sniffer test, and with the post cat O2 sensors disabled by ECU software, the M3 will fail the OBD II test. Operating your sled cat free is not only irresponsible on several levels, but it will cause you more headache than it's worth.
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