Using new head bolts when performing a cylinder head installation is always a good idea however, on late-model engines that came from the factory with TTY (torque-to yield) head bolts, replacement is an absolute necessity. TTY bolts are designed to exert the maximum clamping force for a tight head gasket seal, however they permanently stretched and could fail if re-used.
Chevy: 65-69 Bel Air V8, 70-72 Bel Air V8, 66-69 Bel Air V8, 70-75 Bel Air V8, 65-69 Bisc V8, 70-72 Bisc V8, 66-69 Bisc V8, 70-72 Bisc V8, 73-74 Blazer V8, 69 Brookwd V8, 70-72 Brookwd V8, 69 Brookwd V8, 70-72 Brookwd V8, 75-80 C10 V8, 68-69 C10 PU V8, 70-72 C10 PU V8, 73-74 C10 PU V8, 68-69 C10 Suburb V8, 70-72 C10 Suburb V8, 73-80 C10 Suburb V8, 90-93 C1500 V8, 75-86 C20 V8, 68-69 C20 PU V8, 70-72 C20 PU V8, 73-74 C20 PU V8, 68-69 C20 Suburb V8, 70-72 C20 Suburb V8, 73-86 C20 Suburb V8, 91-00 C2500 V8, 92-99 C2500 Suburb V8, 75-86 C30 V8, 68-69 C30 PU V8, 70-72 C30 PU V8, 73-74 C30 PU V8, 88-00 C3500 V8, 91-00 C3500HD V8, 67-69 Camaro V8, 70-72 Camaro V8, 69 Camaro V8, 66-69 Caprice V8, 70-72 Caprice V8, 66-69 Caprice V8, 70-76 Caprice V8, 65-70 Chevelle V8, 70-72 Chevelle V8, 70-73 Chevelle V8, 68 Chevy II V8, 65 Vette V8, 66-69 Vette V8, 70-74 Vette V8, 66-70 El Cam V8, 70-72 El Cam V8, 70-75 El Cam V8, 69 Estate V8, 70 Estate V8, 69 Estate V8, 70 Estate V8, 96-00 Express 3500 V8, 73-74 G10 Van V8, 76 G20 V8, 73-74 G20 Van V8, 75-76 G30 V8, 88-96 G30 V8, 73-74 G30 Van V8, 65-69 Impala V8, 70-72 Impala V8, 66-69 Impala V8, 70-76 Impala V8, 76 K10 V8, 79-80 K10 V8, 68-69 K10 PU V8, 70-72 K10 PU V8, 73-74 K10 PU V8, 68-69 K10 Suburb V8, 70-72 K10 Suburb V8, 73-74 K10 Suburb V8, 76-78 K20 V8, 80 K20 V8, 68-69 K20 PU V8, 70-72 K20 PU V8, 73-74 K20 PU V8, 68-69 K20 Suburb V8, 70-72 K20 Suburb V8, 73-74 K20 Suburb V8, 85 K20 Suburb V8, 91-00 K2500 V8, 92-99 K2500 Suburb V8, 77 K30 V8, 80-86 K30 V8, 68-69 K30 PU V8, 70-72 K30 PU V8, 73-74 K30 PU V8, 88-00 K3500 V8, 76-78 K5 Blazer V8, 69 Kingswood V8, 70-72 Kingswood V8, 69 Kingswood V8, 70-72 Kingswood V8, 73-75 Laguna V8, 65-67 Malibu V8, 73-75 Malibu V8, 70-72 Monte Carlo V8, 70-75 Monte Carlo V8, 69-70 Nova V8, 70-72 Nova V8, 70-71 Nova V8, 73 P10 Van V8, 76 P20 V8, 79 P20 V8, 70-71 P20 Van V8, 73 P20 Van V8, 75-99 P30 V8, 70-71 P30 Van V8, 73-74 P30 Van V8, 87-88 R20 V8, 87-88 R20 Suburb V8, 89 R2500 V8, 89-91 R250
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Fel-Pro:ES72264Magirus:HB33038MAHLE Original:GS33287