Koyo leads the radiator industry in quality, performance and fitment. Koyo engineers carefully design the radiators offering a true plug and play installation No drilling, cutting, relocating, or stretching to get their radiators to fit properly.These OEM Koyo replacement radiators feature plastic end tanks with a aluminum core, allowing for a cost effective option compared to the OEM units. Fits 98-04 Nissan FRONTIER 2.4L I4 AT 99-04 Nissan FRONTIER 3.3L V6 AT 00-04 Nissan XTERRA 2.4L I4 AT 00-04 Nissan XTERRA 3.3L V6 AT Supersedes A2151