On my VMP kit it came with Brisk plugs. Upon tuning there was apparently a suspected issue with the Brisk plugs. We swapped them out for NGK's. I don't have specifics on the reasons as I trust my tuner. But it sounded like a knock issue at higher RPM's on the brisk plugs. I also believe the brisk plugs come pre-gapped. VMP runs brisk plugs with no issues on their cars. It's more a personal preference I believe and what you/your tuner are comfortable with.