Purchased but never used nor installed. Stored inside, never even removed protective sleeves. The ARP 203-5001 Toyota 4-Cyl. Pro 2-Bolt Main Bolts are high-quality fasteners designed specifically for the 1988-1991 Toyota 4-cylinder engines. Made from durable 8740 Chromoly material with a fastener tensile strength of 190,000 psi, these bolts feature a 12-point head style and a black oxide finish for added strength and corrosion resistance. Sold as a kit, this performance part comes with nuts and washers included, making it convenient for installation. The ARP brand ensures reliability and quality, making these main bolts a must-have for enhancing the performance of your Toyota engine.