Page Views: 83 Date Added: 03/12/2018 Last Updated: 03/12/2018
ATECO takes a great Marine 502 head and makes it better! If you're looking for more power at a reasonable price, look no further. We've seen up to 30 HP improvement over original heads. Stock replace for Merc 500 MPI, 500 HP, 500 EFI engines. We install thin wall bronze guideliners, and hone to special clearances and include multi angle valve seat work. Heads are CC'd and Milled to 118CC's. The heads are washed and assembled for roller hyd camshaft. All work is done IN HOUSE. These are NOT factory assembled heads.