This is the OS Max Screw Set for the 15LA Engine. / / FEATURES: Made Of Black Colored Steel. / Utilizes Phillips (X-Shaped) Heads / / INCLUDES: Four 2.3 x 7mm Hex Head Screws For Rear Cover (Back) Plate / Four 2.6 x 8mm Hex Head Screws For The Heatsink (Cylinder) Head / / REQUIRES: Phillips Head Screwdriver. / MAF 6/6/99 / ir/jl