P4876 is (was) Cummins. 110-M casting number.
They machined 'em.
Have fun, read between the lines and Come to your own conclusions, I guess wave

The superseded P515 is Edelbrock. 110-M1 and I believe M2 (showing a little Mopar humor) casting number.

Supersessions usually happen for a good reason....

The head were talking about is one of the items MP management (of the 2008 timeframe) replaced
based 100% on customer input. Same managers who did the world block, the aluminum 452 wedge
Head, the wedge branded rpm intake, and alot of other very worthwhile projects.
Some effort went into it.

I guarantee more would have happened for the good, had the same staff stayed on.

Is P515 NS1?
If it isn't, then I'm not sure what to make of "when they're gone they're gone" (unless referring back to the p4876 stuff)

Rich H.

Esse Quam Videri