HKS twinpower

[Flightmedic]

What do you guys think about this piece? Is it a worthwhile upgrade or is it one of those modifications that goes unnoticed?

 

[Captain KRM P5]

the speed6 i drove with it was noticeably smoother and had more mid range pull. i liked the effect it had on the car we installed it on VS what it was before. i can't say i've dynoed with and without it.