We recently brought you our review of the 2014 ROUSH Perofrmance RS3 Mustang. During our week with the beast we were able to drag race, road race, and drift the powerful pony car.

The standard RS3 from ROUSH makes 575 hp at the crank, a fact we backed up on our in house Dnyojet chassis dyno last year with 501 hp making it to the rear tires. These power numbers creep close to what the stock Coyote engine internals are capable of handling.

What if you’re an enthusiast who wants more than the standard 575 hp RS3, ROUSH has several options including the wicked Phase 3. The Phase 3 package kicks the power up further with the addition of a Ford Racing Performance Parts Aluminator crate engine. Featuring beefier internals and a slightly more supercharger friendly compression ratio of 9.5:1. Combined with a pulley upgrade for the supercharger, the power jumps to 675 hp at the flywheel.

Recently Ray Skillman Ford had a RS3 Phase 3 at their dealership, and took the opportunity to put the car on their in house dyno. The RS3 Phase 3 spun the rollers to 598 hp at the rear tires, and John Trischler the performance manger for Ray Skillman Ford states that this should work out to about 688 hp at the crank.

Trischler goes on to point out several other features of this particular Phase 3, including the V8 Red paint job, a $15,000 option. The high metallic paint does add a lot of glow to the car, and if you’re going to go all in on anRS3 Phase 3, why not make it unique with some cool paint as well.

The video alone is worth watching to hear the nearly 700 hp engine screaming on the dyno. The best part of the RS3 package is that even in Phase 3 form the car remains 100-percent street and emissions legal, making this quite possibly the ultimate daily driver, street/strip, or track Mustang for those who can afford it.