Conor O'Shea celebrated Harlequins' triumph in the LV= Cup and admitted it sets them up well for their bid for a trophy treble.
Tom Williams, Tom Guest, Tom Casson and Luke Wallace all touched down for Quins as they overpowered Sale Sharks 32-14 at Sixways.
Fly-half Ben Botica added 12 points via two penalties and three conversions while Sale's solitary try came via centre Johnny Leota with Danny Cipriani kicking three penalties.
It was Harlequins' first domestic knockout cup win since 1991 and the many youngsters blooded in the LV= Cup means Quins will have the nucleus of talent "for a decade to come," according to O'Shea.
But more pertinently it puts Quins on course for a potential treble as they look to retain their Aviva Premiership title and also lift the Heineken Cup.
O'Shea said: "I'm just over the moon for the group. It is a long way into the season and we face a massive next nine weeks but, for those players, that is something that is a reminder to everyone coming back in the next couple of weeks.
"For the club, not only is it a major trophy, when you look at four guys in the tight five who are 21 and under, that is something for them to store away in their locker for years to come and they are the cornerstone of what this club will be about for a decade or more.
"They have won a national trophy and we said before the game not to take anything for granted because you never know when you will get there. We have been very fortunate to be in a number of finals in the last few years and to have come away with a trophy.
"There is a good vibe in the dressing room and a lot of very proud parents of young men but it sets us up to really attack what will be ups and down in the coming weeks. We know that.
"We have Saracens away and Gloucester away five days later, Munster in the Heineken Cup, Bath. Worcester, Northampton. It is just so unbelievably exciting for this group.
"Now everyone will have to play their part. We have a lot of quality to come in."