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 91-93 Buick REGAL 3.1L V6 AT 91-93 Chevrolet LUMINA 3.1L V6 AT 92-92 Oldsmobile CUTLASS 3.1L V6 AT 91-93 Pontiac GRAND PRIX 3.1L V6 AT