Originally Posted by
BradS
Just finished breaking in a P5xlt, a month after breaking in a +4. The p5 seemed much easier, that thing screamed right away. Seems like it took all the way to 2 gallons for the +4 to come around
The plus 4 has the hard team piston, which takes longer to break in but also lasts longer. P5 does not. Still great quality though.