Product Summary

Chevy Small Block V8, Hex Wrench Type, Steel, Painted

  • They are tested to over 180,000 PSI
  • Has a 1/2" wrench size and a 1.375" thread length
  • Provides improved wrenchability with 1/2" hex head
  • Is longer than stock so it can be used with washers
  • Made from steel with a painted finish for added protection

Key Specs

Material TypeSteel

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Heavy duty design, longer than stock, for use with head bolt washers. 

  • 180,000 PSI material
  • Longer than stock for use with washers
  • Improved wrenchability with 1/2" hex head

Order one set per head (two sets required per motor). Washers sold separately. 

Item Details

Enough for one head

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.


Material TypeSteel
Wrench TypeHex
Wrench Size1/2"
Thread Length1.375"
GTIN Code807298018249
Notes1 set will do 1 head. There are 17 bolts to the set: 8 at 1.676" underhead length, 7 at 3.823" underhead length, 2 at 3.10". 180,000 PSI tensile strength.
Sold in QuantitySet