You are absolutely right your truck is a four cylinder engine but has eight spark plugs (to lower emissions). I will get this corrected. The labor to replace the spark plugs in total intake and exhaust side is 1 hour. Sorry for our mistake thank you for bringing this to our attention.
I have just completed replacing the spark plugs on my 1999 Mazda B2500. I should say that I replaced six of the eight plugs with the wires. How do I get to the two hidden by the intake manifold? Do I need to take the intake manifold off?