This plug will increase your rack travel for more fueling on your P7100 pump.
AFC modifications are required to get the most out of this plug.
The stock rack plug allows for 19mm of fuel rack travel.
This "Mack" rack plug allows for 21mm of fuel rack travel.
Using this plug with 215 pumps may retard your injection timing up to 3 degrees at 21mm of rack travel.
Removal of pump is required for install unless you grind the timing cover.