Sorry for the stupid question but what or who makes the PF59?

 

AC Delco - sorry.

 

You're not supposed to beat on your car till it's warmed up, once mine is warm I have no slap. I use Nitrous to clean the plugs and piston heads Ever notice that after you make some runs on the juice and pull your plugs that they are nice and clean.

 

What is piston slap? And what does it sound like?

 

Sounds like a dull metallic 'clatter'. Usually only on startup and til the engine gets up to temperature.

-Mindgame

 

Are there years that this is limited to ie the 01-02, vs the 98-00 (when they started building the LS1 w/ the different intake)?