These genuine Bosch 42# "Green Giant" injectors are a direct fit for upgrading your 97-03 3800. They have an EV1 connector and come with new injector o-rings. The 2004 and newer Grand Prix(only) or 2000 and newer NA (not supercharged) cars will require new EV1 style injector connectors. 

Beware of the China look a likes on websites like eBay.

PCM programming is required whenever your injector size is changed from stock.