Definitely worth the purchase. The best bang for your buck. It makes it feel like a completely diffrent car.
The ktuner with the stage 1 is awesome, it makes the car feel more responsive and allows the turbo to spool up even if you partly on the throttle which really makes the car feel more awake
Installed this today on a friends 2025 Civic Si, everyone do yourselves a favor and get the titanium studs. Makes the install a breeze. Paired this up with a PRL RMM. The car has more power over the entire rev range and sounds pretty damn good with the stock exhaust.