I don't know what stock 325hp marine engine came with roller rockers. It really depends on the cam profile. Dual pattern really doesn't mean anything for practicality. My question would be are they self aligning rockers for vortec / centerbolt heads, or are they for heads with guide plates? What style do you need? $375 doesn't seem bad if they are full roller rockers. The way I would look at it, if it is some stock cam, you are taking it off his hands. You are only buying the lifter / dogbone / spider assembly (if OEM style) and roller rockers (roller trunion and tip). The pushrods / springs may not work for you if you depending on your machine work. If you can offer up more equipment details, we can better help.

SB, I like that combo you put together. Decent cam with good flowing heads. Completely believable speed increase. My old Searay 18'6" transom length 20"2" LOA went from 56 to 63 with ported stock centerbolts, comp flat 260H, performer intake and Kodiak exhaust. Stepping up to a 383 with the 212/218 extreme energy hyd roller and trickflow heads bumped it up to 68-70 and the Alpha SS bumped it to 75. What hull are you working with?

I currently have on the engine stand a Merc 6.2 MPI that has been converted into a 383.
3.750 stroke
6.000 rods
4.030 CP Pistons
Profiler 190 Heads
Holley Stealth EFI
Marine Kinetics Hydraulic Roller
This is the next engine up on the dyno. I will let you know and post dyno results. If you are looking for a cam, the only recommendation I will make is call: Marine Kinetics.

He's gone from here now - last night or this AM. Got booted out by the admin. That's 2 offshore sites he can no longer peddle parts out of and ruin people's boating hobby / sport. Thanks for coming clean with your experience.

You know me. I'm CFM from the other boards. Many eons ago I signed in here before the others. Thus the different name.
That boat went from 53/54 to 68.7mph. I'm going to hang a SS on it this or next year (secured a broken one this winter...lol) and see if I can get this million hr beat on hard 5.7 shortblock over 70.
Has the making for a stout build. What kind of boat is this going into ?

Last time I checked a 6.2 was a 383. What did u convert??

Ah SB=CFM didn't realize that. So the Mirage. I thought that boat only went like 45 or so...

I think a stock 6.2 is a 377"

6.2 MPI is 377 CID

38 actually. 45 is our speedlimit.