SBC Modified Long Tube Header 602 Crate 1-5/8in

The SCHOENFELD SBC Modified Long Tube Header 602 Crate 1-5/8in (model 1185CM2) is a purpose-built performance exhaust header designed specifically for small block Chevy 602 crate engine builds competing in IMCA Modified racing. These long tube headers feature 1.625-inch primary tubing that converges into a 3-inch collector, optimized to extract maximum horsepower and torque from 602 crate engine platforms while maintaining compliance with IMCA technical regulations.

Constructed from mandrel-bent steel with a durable black paint finish, this header pair includes all gaskets and mounting hardware required for installation. The 1-5/8-inch primary diameter provides the scavenging efficiency necessary for 602 crate engines without sacrificing low-end torque delivery—critical in bracket racing and circle track applications where consistent, predictable power across the RPM range determines lap times. The 3-inch collector diameter smooths exhaust gas transition and minimizes backpressure, allowing the engine to breathe freely through higher RPM ranges.

IMCA Modified racers and circle track competitors building or upgrading 602 crate engine platforms choose Schoenfeld headers for their engineering pedigree in sanctioned racing. These headers are engineered to work within IMCA rule sets while delivering measurable power gains over stock or poorly designed alternatives. Complete gasket and hardware inclusion eliminates the need for sourcing additional components, streamlining the installation process in the shop or garage.

At 28.01 lbs per pair, these headers represent a solid investment in proven race-proven exhaust technology. Whether preparing a fresh 602 build or upgrading an existing platform, Schoenfeld's track record in IMCA and grassroots racing speaks to the reliability and performance expectations competitors bring to the starting line.