"It's obviously a motivation to do good," Giroux said.
"I had goosebumps, to be honest with you," said Voracek, who scored the Flyers' second goal and was later knocked out of the game after absorbing a vicious hit from defenseman Niklas Kronwall. "To see Mark and Gordie Howe on the ice was something special."
The Flyers won despite being outshot by 39-23, including a 37-14 margin over the last two periods.
Bryzgalov made big stops on Valtteri Filppula and Jiri Hudler in the final minute to protect the one-goal lead.
Giroux gave the Flyers a 2-1 lead by finishing off a breakaway with a clever backhander with 1 minute, 49 seconds remaining in the opening period. Kronwall couldn't keep the puck in Detroit's offensive zone, and Giroux broke out ahead of the pack.
The speedy center also keyed the next goal while the Flyers were shorthanded, taking the puck away from defenseman Ian White at one end and going in on a breakaway. Joey MacDonald made the save, but Max Talbot (18th goal) knocked in the rebound, putting the Flyers ahead, 3-1, with 5:50 to go in the second.
Three seconds after its power play expired, Detroit cut the lead to 3-2 as Johan Franzen scored from the left circle with 11:13 left in the third period.
Earlier, the Wings became the 10th Flyers opponent in the last 11 games to score the game's first goal.
Four minutes into the game, Henrik Zetterberg scored on a backhander from the right circle, beating Bryzgalov to the short side with the Red Wings' first shot. It marked the fourth time in the last five games an opponent had scored on the first or second shot of the game against the Flyers.
Nearly 10 minutes later, Voracek scored the equalizer when his wraparound caromed off the skate of Detroit defenseman Brendan Smith and went past MacDonald. MacDonald, starting because of a groin injury to all-star Jimmy Howard, had left the puck for a teammate behind the net, but Voracek picked it up and notched his 12th goal.
"I think there might have been a miscommunication with the D," Voracek said. "I just grabbed the puck and wrapped around and it went in."
With about 121/2 minutes left in the second period and the Flyers holding a 2-1 lead, Voracek was violently knocked to the ice by Kronwall's open-ice shoulder hit to the winger's face. No penalty was called, and a woozy Voracek went to the locker room.
Kronwall figures to have a hearing with the NHL and faces a possible fine and suspension.
Less than seven minutes after Voracek left the ice, Talbot made it 3-1.
Jagr also was injured in the second period. Neither returned.
Brayden Schenn replaced Jagr on a line with Giroux and Scott Hartnell at the start of the third period.
Detroit played without six injured regulars, including high-scoring Pavel Datsyuk (knee) and standout defenseman Nicklas Lidstrom (ankle).
Contact staff writer Sam Carchidi at email@example.com or on Twitter @BroadStBull