The answer will depend on what 19b4 and h6 are.
your h6 has a timing chain
Porsche H6 means Porsche Flat-6 Cylinder Engine
Benzene
H6 tolerance for 95 mm hole is +0.022/0
( H6 ) - is a 3.73 limited slip differential on a Ford truck / SUV
Benzene
( H6 ) - is a 3.73 limited slip differential on a Ford truck / SUV
+19/-0 micrometres for H6 over 50mm up to 80mm dia
You may call the California DMV Mandatory Actions Unit 39 months from the violation date (39 months from the conviction date if you have a commercial license) and ask them to purge your record as long as there were no more serious violations on the same ticket. You can reach them at 916-657-6525.
A number of tags only have one letter, like <b> or <i> or <p> or <u>.
the 3.0 h6 has a chain,it doest need changing