I changed the sparkplugs and gapped the fresh once at 0,8mm, just to see if I would get any blow outs, but so far so good. Am in the middle of tuning session with 3,5" intake.
Hello, I adjusted my signature so you can see the mods. The HKS product was very easy to install, because it came with a plug and play harnass. All I had to do was plug it in the ignition wiring without cutting, find a space for it under the hood of my Mazda 6 MPS and connect earth wires! Link...
Hello, I bought those and installed them. They are working fine. Spring inside seems harder and the package is topclass. All in separate boxes with padding! I also have a HKS Twin Power connected to them. That was right from the start. Don't know how they perform without the HKS.