You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when did the 24 valve cummins come out?" whose answer is 1998.
Each document should contain about 30 words, and these documents should contain useful information.

Query: 24 valve cummins release date
Useful Output:

Doc 1: 2nd-Gen Cummins specifically is a 1994 to 2002 Dodge Ram pickup truck equipped with a 5.9-liter Cummins diesel engine.
Doc 2: The 24-valve version of the 5.9L Cummins is introduced along with a more powerful V-10 Magnum and stronger transmission offerings for 2000.
Doc 3: The 6.7 Cummins first came on the scene in 2007. When it arrived, it brought over 40 percent of the 5.9 Cummins engine's internal parts with it.
Doc 4: For the second half of the 1998 model year, Dodge made some big mechanical updates with the introduction of the 5.9L Cummins 24-Valve
Doc 5: Produced from 1994 through 2002, the overhead valve inline-six engines feature cast iron engine blocks and cylinder heads, cast aluminum pistons