Out of the box it looked like a sturdy and solid unit. But upon installation, the part that vents to atmosphere won’t clear the cross over tubes so I had to remove the mouthpiece in order for it to fit, my stock OEM bolts could not clear the NOV and gasket due to the flange thickness so I had to buy some more. Performance wise I have it on the loosest setting and the car still bogs in RPM. But you get what you pay for I guess.