The Street Performance 6.7 Cummins Long Block is engineered for high-performance street applications, delivering up to 1000 HP while maintaining durability and reliability.

Built with DandJ X-Beam Stock Length Billet Rods and a Stage 1 High-Performance Cylinder Head, this long block is precision-machined, blueprinted, and balanced to handle extreme power demands. The fire-ringed cylinder head, paired with custom ARP 9/16 Inch head studs, ensures maximum head-to-block sealing under high boost.

Shipped pre-lubed with break-in oil, this long block is fully assembled and ready for installation. Manufactured by DandJ Precision Machine, this engine is built to withstand the rigors of high-horsepower street and track builds.

Warranty:

Parts

90-Days

Labor

90-Days

Note:
Not for sale on licensed California vehicles

Features:

• Rated for up to 1000 HP - Engineered for high-performance street and competition applications. High-horsepower tuning is not recommended for heavy towing.
• DandJ X-Beam Stock Length Billet Rods - Provides exceptional strength for high-power builds
• Fire-Ringed Cylinder Head - Machined for superior head-to-block sealing in high-boost applications
• Stage 1 High-Performance Cylinder Head - 5-axis CNC ported with HD bronze valve guides and oversized intake/exhaust seats for optimized airflow
• Fully Assembled and Pre-Lubed - Includes oil pan, front cover, machined rocker box, and break-in oil for seamless installation