The FC3S turbo runs two
catalytic converters. The first cat is the pre-catalytic converter, or
pre-cat. This pre-cat is strictly used to suppress cold-start
emissions. This pre-cat is prone to failing - if the pre-cat fails, it
disintegrates and clogs the main catalytic converter. Strictly as a
maintenance precaution, we recommend replacing the pre-cat with a tubular
Note, for those who need to adhere strict emissions laws (i.e.
state of California smog tests), this modifiction will not pass a thorough,
visual emissions inspection. Tampering with a good, working automotive
emissions system is in violation of federal laws.
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