Headers SBC Stock Clip 1-5/8 - 1-3/4 3in Coll.

The Schoenfeld Headers SBC Stock Clip 1-5/8 - 1-3/4 3in Collector (MPN 155V-3) is a purpose-built exhaust manifold package engineered for small-block Chevy engines in IMCA Modified racing applications. These headers feature 1.625-inch primary tubes flowing into a 3-inch collector, a configuration optimized for mid-range torque production and consistent scavenging across the RPM range typical of modified short-track racing. The pair arrives complete with gaskets and mounting hardware, ready for installation on a prepared engine platform.

Constructed from steel and finished in black paint, these Schoenfeld headers meet the structural demands of high-heat exhaust environments found in competitive motorsports. The 1.625-inch primary diameter represents a moderate bore size chosen to balance cylinder scavenging efficiency with backpressure characteristics—smaller than large-displacement street headers but larger than high-RPM race tubes. The 3-inch collector consolidates flow from both banks, a size selected to manage velocity and prevent excessive reversion in the modified power band. Gaskets and fasteners are included, eliminating the need for separate ordering before first installation.

IMCA Modified competitors and small-block Chevy engine builders seek out this header configuration for consistent mid-range performance and proven compatibility within a rulebook-restricted environment. The standardized dimensions ensure fitment with typical modified chassis and exhaust plumbing. Weighing 28.3 pounds for the pair, these headers integrate into both traditional and updated engine bay layouts commonly encountered in oval-track racing.

Schoenfeld is recognized in the racing community for headers engineered to specific rulebook parameters and power characteristics. These SBC stock clip models represent the brand's focus on IMCA and similar sanctioned racing classes where header specifications are tightly defined. Drivers and engine builders familiar with Schoenfeld's small-block Chevy headers for sale understand the relationship between primary tube size, collector design, and engine response in the critical 3000–5500 RPM operating window of modified racing.