Originally Posted by silverM3
No not true at all. I have tried both. OS 1040 SC is way better than the VR12 Plus, in terms of quality and performance. I don't have OS speed tuned. I only have a TZ 3 port. It seems to be that OS 1040 gives more torque and similar top end speed. Also, the craftsman of 1040 is superior than the VR 12 Plus.
Also, I suggest a 5mm 1040 instead of 6mm, if you intend to go to race.
How is your fuel efficiency? What the Skyline pipe may lack compared to the 1040 from OS, it makes up with superior fuel efficiency. I'm pretty sure anyone comparing those pipes back to back will notice more runtime with the Skyline pipe. And the difference in the power band is useless if you can't make 5 min on a full tank.