Slip-On Collectors 2-1/4in x 4-1/2in (Pair)

The Hedman Slip-On Collectors 2-1/4in x 4-1/2in Pair (Model 14146) represents a critical upgrade for custom exhaust builders and engine modification enthusiasts seeking improved scavenging and flow characteristics. These slip-on collectors serve as the primary junction point where individual cylinder runners converge before entering the main exhaust system, making them foundational to any high-performance or custom build. Whether you're fabricating a street rod, restoring a classic muscle car, or optimizing an engine swap, quality collectors directly influence horsepower delivery, exhaust gas velocity, and overall system efficiency.

Constructed from durable steel with a natural (unpainted) finish, these collectors feature 2-1/4 inch primary tube diameter with a 4-1/2 inch outlet, optimized for mid-range to high-RPM power bands typical of V8 and larger displacement engines. The slip-on design allows for flexible fitment around tight engine compartments and simplifies installation compared to welded alternatives. At 10 inches in length with a combined weight of 7.95 pounds per pair, they balance structural integrity with practical weight management. The natural steel finish requires proper heat shielding and finishing to prevent rust in high-temperature exhaust environments, but provides an excellent foundation for ceramic coating, powder coating, or chrome plating for long-term durability and aesthetic appeal.

Serious fabricators, hot rod builders, and performance mechanics rely on Hedman collectors for custom exhaust manifold assembly and header fabrication work. These slip-on units are ideal for applications requiring custom primary tube routing, engine bay modifications, or non-standard mounting scenarios where cast iron manifolds won't fit. Proper installation demands tight clamping bands and high-temperature fasteners to prevent exhaust leaks; factor in gasket material and clamps when ordering. Verify primary tube diameter compatibility with your specific engine platform before purchase, as 2-1/4 inch primaries suit larger-displacement engines better than small-block applications.