The deadlift split squat is a great low body exercise if you want to really focus on the quads. This is a constant tension movement – the quads never get a break, and that's great for hypertrophy.
Simply split squat or lunge over a barbell, grab the bar, and stand up. Switch legs and repeat for reps. Focus on your legs, particularly your quads, and minimize lower back action.
As a bonus, this variation requires more torso stabilization so you'll get some core work too.
Over the last few years it seems that just about every "in the know" performance coach has discussed the conjugate method and why they find it to be the most effective way to train an athlete. By now I think we all know the definition of conjugate or concurrent periodization and how it involves simultaneously trying to raise multiple qualities.