Car: 2008 Milano Red CTR
Join Date: 1st August 2010
Thanked 40 Times in 38 Posts
Only really worth getting the HKS if your running it with a heatshield otherwise things will get pretty hot during the summer.
I had the HKS and it ran fine on stock map as the piping is the same shape and length as stock and is velocity stacked and doesnt mess with the MAF sensor in a big way. The CPL almost certainly will and I would run this only with a remap(and preferably a MAP based tune).
The CPL will give better gains however when done right, but the HKS is more flexible.