"We've got promising props like Mason Kean and Pouri Rakete-Stones but they aren't ready for the Premiership yet. In the future we will have good young talent like Tim Farrell and Kianu Kereru-Symes coming through so this is why we've got Ben for this season only ... we have to make sure we are competitive," Philpott said.
Filipo, 37, played five matches for the All Blacks from 2007-08. He was a replacement for Allardice at the Chiefs last year and was outstanding in his two starts before heading to Europe. Philpott said he doesn't expect to see much of All Black lock Brodie Retallick this season and Filipo will be the ideal back up to the Hurricanes pair of Geoff Cridge and Mark Abbott.
"Ross is very keen to follow a coaching path. He will bring a lot of tactical nous and will be able to assist us with match analysis," Philpott said.
The Magpies have five locks, four of whom are Super players and one of those is Retallick. The promising Sanaila Waqa, who made 11 appearances last year, is unavailable this season with a shoulder injury.
"We're very pleased to be able to secure Ross and Ben, they're quality men with a significant amount to offer on and off the field," Hawke's Bay Rugby Football Union CEO Mike Bishop said.
Bishop signed Filipo to play for Marlborough when he was CEO of that union in 2001. Filipo has also played NPC rugby for Wellington and in addition to playing for the Chiefs at Super level has represented the Crusaders. May played Super Rugby for the Crusaders and Chiefs before linking up with the Canes and in 2013 played for the Fukuoka Sanix Blues in Japan.
"With having had five Magpies teammates in the Hurricanes forward pack this year, the transition into playing for Hawke's Bay should be a seamless one, and a challenge that I am looking forward to," May said.
"I'm excited about joining the Magpies and reuniting with my former Chiefs teammates, Michael Allardice and Brad Weber, for the Mitre 10 Cup. I believe Hawke's Bay will be a real force in the Premiership this season," Filipo said.
In addition to Edmonds and Allardice, Chiefs utility back Andrew Horrell, Highlanders utility back Richard Buckman and versatile Crusader Robbie Fruean are other experienced 2015 Magpies who aren't expected to play for the Bay this season.