new bolts & old (broken/worn)If your lift bolts are completely broken, lift doesn't kick in. That means your rev limiter lowers to 7000 RPM, you have no boost of power at 6000, and you'll be slower than a GT. If they're intact or lodged in the rocker shaft, lift will engage like normal. There was no difference in lift engagement between my lodged lift bolts and my new lift bolts.