have a super clean pair Heads for 525 2001 year with 48 hours and have been checked and valve job problem was CMI exhuast $1900 call or e-mail me [email protected] thanks

Who makes those for Mercury? Dart? What size chambers and intake ports do they have?

I think they were made by Edelbrock for mercury racing and 118 cc chambers and square ports , intake valves are Manley severe duty 2.250 and inconel exhaust 188 comp springs,retainers,locks,gude plates,arp studs