Carrillo SC7121-4 CARR Rod Bolt Set High-Performance Connecting Rod Fasteners

Engineered for extreme reliability, these bolts are the ideal choice for high-revving applications where maximum clamping load and fatigue resistance are critical.

Key Features:

• MP35N Multiphase alloy construction — delivers an Ultimate Tensile Strength (UTS) of 285,000 psi, significantly stronger than standard H11 tool steel alternatives
• Asymmetrical thread design — each thread is slightly different from the previous, providing evenly distributed thread engagement for increased clamp load and superior fastener fatigue life
• Rated for unlimited torque cycles — when properly installed using the stretch method, CARR bolts offer indefinite re-use capability without replacement
• Recommended for engines exceeding 8,500 RPM — the preferred bolt upgrade for extreme high-RPM and high-horsepower builds
• Pack of 4 bolts — sufficient for one connecting rod set on a 4-cylinder engine or partial replacement on larger applications
• Supplied with CP-Carrillo's recommended assembly lubricant specifications for correct preload installation
• Stretch-method installation preferred — CP-Carrillo recommends bolt stretch measurement over torque for the most accurate and consistent preload

CP-Carrillo CARR rod bolts are the fastener of choice for professional engine builders competing in drag racing, road racing, oval track, and endurance motorsports. Each bolt is manufactured to CP-Carrillo's exacting standards, ensuring dimensional integrity and reliable performance in the most demanding race environments.