Sierra 18-5299 Mercruiser Electronic Conversion KitSierra high-quality engine parts are designed to meet OEM specifications. For use on most Prestolite V-8 Distributors with screw down caps. Replaces points & condensers for true solid state ignition; Uses standard coil, cap & rotor; Easy to install, one-piece, 2-wire hook-up; Accurate to within 1/4 timing accuracy 0 to 6000 RPM range; Use with 18-5403 style rotor; Use with: 18-5403 Rotor; 18-5466 Hi-performance Ignition Coil; Interchangeable with: GLM; 72540; Mallory; 9-26902;