Solid Lifter Conversion Kit 4.7L V8 SOHC

The Air Ram Performance DG00216 is a solid lifter conversion kit engineered to replace the factory hydraulic lifters in 4.7L V8 SOHC Dodge, Chrysler, and Jeep engines from model years 1999-2007. This upgrade is ideal for enthusiasts looking to enhance the performance of their 4.7L engine, particularly those upgrading valvetrain components or camshafts. Each solid lifter assembly is meticulously crafted from premium 8620 Aerospace and 4130 chromoly steel. Key components include a fine-threaded lash adjuster featuring a radiused pivot head, manufactured to exact OEM specifications for compatibility with factory rocker arms. The lash adjuster undergoes heat treatment to maximize surface hardness and wear resistance, secured by an 18-8 stainless steel jam nut. The lifter body itself is cryogenically treated and precision-machined to ensure optimal clearances within the cylinder head slots and oil passages. A black oxide chemical coating is applied to enhance lubricity, provide corrosion protection, and improve wear and anti-galling characteristics. The primary benefit of this solid lifter conversion is a significant increase in horsepower, particularly in the mid to upper RPM range. Solid lifters offer greater consistency, open further, and close faster than hydraulic units, leading to superior valvetrain control and extended duration at higher valve lifts. This design effectively eliminates the power loss associated with hydraulic lifter collapse at high RPM thresholds and under high valve spring pressures. Furthermore, unlike hydraulic lifters which can be affected by oil pressure fluctuations, this solid lifter system maintains consistent operation, enabling the use of higher spring pressures and more aggressive camshaft profiles. Beyond top-end power gains, the solid lifter conversion also enhances drivability and low-end power. By closing the valves more rapidly, cylinder pressures are kept consistently higher, contributing to a smoother idle and eliminating the common "lifter tic" noise caused by excessive valve lash. This conversion sets and maintains valve lash to spec, resolving issues that can arise from dirty or sticking hydraulic lifters. The kit includes all necessary hardware for a straightforward installation.