4042157: ARM;ROCKER,EXHST

**Product Description: Exhaust Rocker Arm** **Function:** - Transfers motion from the camshaft to the exhaust valve, allowing timely opening and closing during the engine cycle. - Converts upward motion of the pushrod into downward motion to open the exhaust valve, releasing burnt air and fuel mixture from the cylinder. **Construction and Materials:** - Typically made from stamped steel or aluminum for high-revving applications. - Roller rockers may include a bearing at the contact point to reduce wear and friction. - High-performance rocker arms may be made from investment 17-4 stainless steel for high tensile strength. **Features:** - May include a roller tip to reduce side loading forces on valves, decreasing valve guide wear. - Could have pressed-in bronze bushings for precise fit and durability. - Designed with a specific rocker ratio, determining how much it multiplies the camshaft lobe lift. **Types:** - Mounting Types: - Pedestal mount (common in LS engines) - Shaft mount - Stud mount **Performance Considerations:** - Contributes to the reciprocating weight of the valvetrain, affecting engine performance at higher RPMs. - Helps dampen harmonics from the cylinder side of the valve train in aggressive applications. - May be rebuildable, allowing for economical repair in case of roller damage or bushing wear. **Additional Information:** - Design may vary depending on the engine make and model. - Proper installation and torquing are crucial for optimal performance and engine longevity. **Note:** - For specific details regarding compatibility with particular engine models or vehicles, please obtain the exact engine model or application intended for this rocker arm.