Koyorad R Series Aluminium Racing Radiator Pin by Veronique Engelen on Kunst Animals, Cute raccoon, Cute animals. Built with a robust 53mm core, the R Core Series is engineered for the serious performance tuner. Increased capacity means better cooling reserve when you need it. Intended for both circuit and daily use, you may double your coolant capacity and see up to 35% increased performance over your stock radiator. Unless noted otherwise, all Koyorad R Series All Aluminum Radiators are Nocolok brazed, designed as a factory fit, direct bolt in with no engine modifications necessary, and retain mounts for the stock fan shrouds and fans. See notes in individual item descriptions for details. Our Quality: Precise Tube and Fin Alignment Construction under strict quality control and solid boxing result in tubes with optimal coolant flow and fins with highly efficient heat transfer. Nocolok Brazing Tubes, Fins, Headers and Brackets are brazed in a state of the art Nocolok furnace, bonding all components to resist damage from vibration, road debris, and the elements. Billet Filler Neck Precision machined billet filler necks are incorporated on each Koyo radiator for strength, durability and better sealing. OE Specific Mounting and Hand Crafted Heliarc Welds Koyo incorporates application specific mounting locations for all fan shrouds, inlet outlet hoses and top bottom mounting pins, ensuring quick and pain free installs. Each Koyo All Aluminum Race Radiator is Heliarc welded individually by hand. This creates the strongest aluminum to aluminum bond, to mate all components. Notes: MT Only Also fits Naturally Aspirated Models. OEM radiator cap is not compatible with this radiator. Must use Koyorad # SK C13 or equivalent. Transfer fan switch (sensor) from stock radiator (M16x1. 5 thread).