Very normal. They squeal at all speeds for the most part, but their performance is second to none. They also wear much faster than PFC-08s. 08s last longer, have rattle clips, quieter, but don't perform at the same level.
| Akrapovic Evo | ESSi | Swift Spec-R | CF Spoiler | APEX ARC-8 | RS-3 | PFC-08 | DIF |