Thermal Cracking Resistant Distributor Cap 805759Q3 for MerCruiser V8 Thunderbolt Ignition Tune Up Features： 1、Applicable Model: The distributor cap is for all 5.0, 5.7, 7.4, 8.2 V8 engines with Thunderbolt Ignition IV or I from early 1980's to early 2000's. 2、OE Number: The part number for reference is 805759Q3. Please confirm whether it is consistent with the OE you need to avoid unnecessary return. 3、Perfect Replacement: The tune up cover is produced to meet the fitness of the original in size and functions to best protect your engine. 4、Rugged Material: The distributor cover is made of rugged material, electrical pitting resistance and erosion resistance, ensuring a long service time. 5、Perfect Replacement: The distributor cap is responsible for helping to distribute electrical current from an ignition coil to a set of spark plugs, and it must be replaced along with the rotor for the engine to run smoothly. Specification： Item Type: Ignition Tune Up Cap OE: 805759Q3 Fitment:  Fits all 5.0, 5.7, 7.4, 8.2 V8 engines with Thunderbolt Ignition IV or I from early 1980's to early 2000's Package List： 1 x  Ignition Tune Up Cap Kit