Use new head bolts.
3.0L / 181 DOHC V6 24V "R" GM Europe 86.00mm Bore 97-01
GM
3.0L / 2961 DOHC V6 24V "W" B308I Nat. Asp. 86.00mm Bore 95-97
SAAB
GM181C-CA | 3.0L / 181 DOHC V6 24V "R" GM Europe 86.00mm Bore 97-01
CADILLAC
SB2961C | 3.0L / 2961 DOHC V6 24V "W" B308I Nat. Asp. 86.00mm Bore 95-97
SAAB