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.
Chevrolet - 1985-05 Astro V6 4.3L, 1995-05 Blazer V6 4.3L, 1985-86 C10 V6 4.3L, 1988-98 C1500 V6 4.3L, 1985-86 C20 V6 4.3L, 1988-95 C2500 V6 4.3L, 1985-90 Caprice V6 4.3L, 1992-93 Caprice V6 4.3L, 1992 Commercial Chassis V6 4.3L, 1985-87 El Camino V6 4.3L, 1996-13 Express 1500 V6 4.3L, 1996-05 Express 2500 V6 4.3L, 1985-95 G10 V6 4.3L, 1985-95 G20 V6 4.3L, 1985-96 G30 V6 4.3L, 1985 Impala V6 4.3L, 1985-86 K10 V6 4.3L, 1988-98 K1500 V6 4.3L, 1985 K20 V6 4.3L, 1988-95 K2500 V6 4.3L, 1985-88 Monte Carlo V6 4.3L, 1990-99 P30 V6 4.3L, 1987 R10 V6 4.3L, 1987 R20 V6 4.3L, 1988-04 S10 V6 4.3L, 1988-94 S10 Blazer V6 4.3L, 1999-13 Silverado 1500 V6 4.3L, 2007 Silverado 1500 Classic V6 4.3L, 1987 V10 V6 4.3L, GMC - 1985-86 C1500 V6 4.3L, 1988-98 C1500 V6 4.3L, 1985-86 C2500 V6 4.3L, 1988-95 C2500 V6 4.3L, 1985-87 Caballero V6 4.3L, 1985-95 G1500 V6 4.3L, 1985-95 G2500 V6 4.3L, 1985-95 G3500 V6 4.3L, 1992-05 Jimmy V6 4.3L, 1985-86 K1500 V6 4.3L, 1988-98 K1500 V6 4.3L, 1985 K2500 V6 4.3L, 1988-95 K2500 V6 4.3L, 1990-99 P3500 V6 4.3L, 1987 R1500 V6 4.3L, 1987 R2500 V6 4.3L, 1988-90 S15 V6 4.3L, 1988-91 S15 Jimmy V6 4.3L, 1985-05 Safari V6 4.3L, 1996-13 Savana 1500 V6 4.3L, 1996-05 Savana 2500 V6 4.3L, 1999-13 Sierra 1500 V6 4.3L, 2007 Sierra 1500 Classic V6 4.3L, 1991-04 Sonoma V6 4.3L, 1987 V1500 V6 4.3L, Isuzu - 1997-00 Hombre V6 4.3L, Oldsmobile - 1991-94 Bravada V6 4.3L, 1996-01 Bravada V6 4.3L, Pontiac - 1986 Bonneville V6 4.3L, 1986-87 Grand Prix V6 4.3L, 1985-86 Parisienne V6 4.3L
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Package Information
Orderable Status:YesQuantity:1Package UOM:Smallest Pack (Consumer Level)Package Level GTIN:00023913659110Package Bar Code:023913659110Weight Variance:0.000000000Stacking Factor:0Inner Quantity:0
Extended Information
Country of Origin (Primary):USEmission Code:Legal USHarmonized Tariff Code (HTS):8484100000Harmonized Tariff Code (Schedule B):8484100000Life Cycle Status Code:Available to OrderLife Cycle Status Description:Available to OrderMSDS Required Flag:NoNational Popularity Code:Top 60% of Product Group Sales Value (Units x $, Hits, etc.)National Popularity Description:Top 60% of Product Group Sales Value (Units x $, Hits, etc.)Pallet Layer Maximum:1
Interchange
Fel-Pro:ES74034Magirus:HB33008MAHLE Original:GS33286