Another reviewer had stated some nonsense about Grade 5 bolts supplied with Energy Suspension's kit: Keep in mind, this specific product is for a Scion XB, so we're not talking about a high horsepower sports car, or Hummer rock climber here:The Grade 5 bolts as supplied are more than sufficient for this application. Sway Bar End Links bolts are never going to see tensile or shear loading sufficient to warrant a grade 8 specification. For the automotive engineers (like me) out there, minimum requirements in Pounds Per Square Inch:G5: Tensile 120K, Yield 92K, Proof 85KG8: Tensile 150K, Yield 130K, Proof 120KThis is not an overall, or broad brushed review of G5 versus G8 (because everyone has an opinion). For the specific application (Scion XB) this kit is well engineered, and should not be modified.