To go is the high 5 with a stock flywheel. The heavier flywheel really helps aid smoother engagements and virtually eliminates engagement chatter. If your at a level with your build to where you need that much holding power, then your hp level is high enough to not worry about the hp gains/losses from a light weight flywheel! I know 3 others that really like their high 5's with oem flywheel. One guy used to dislike the high 5 with his LW flywheel until I suggested he switch back to oem. Now he loves it! :-)