- Location
- Antioch, CA
For passing smog though, they are not supposed to pass it if there are exhaust leaks
Not true. Exhaust leaks are not a reason to fail a smog test. However, if there are enough leaks in the exhaust that fresh dilutes the exhaust stream too much the smog machine will not allow the test to run.
Holes after the cat are OK. Holes before the cat will cause you to fail emissions, but not fail the visual portion of the test.