Koyorad All-Aluminum Race Radiator 2000-2009 Honda S2000Koyorad released a new and improved all aluminum performance radiator for the Honda AP1 and AP2 S2000 (replacing Koyorad part# R2344). Koyorad is always making improvements to their products and have revised their 53mm thick standard core version with the new 36mm "Hyper" core. The revised core has an increased fin and tube count for improved heat dissipation. This decrease in core thickness reduces overall weight while increasing air circulation and