What exhaust do you have currently?  The through bolt/Long bolt style work the best to keep manifold surfaces true without warping.  I would look for a set of those, probably going to be the cheapest route as an offshore style header is $$$.  You can look into through transom tube headers but most work similar to the over transom which require water injection and thats one more thing to worry about if you ask me.

HB

Try Jim brock

Oops forgot cam card

Sent from my SPH-L900 using SoCal Jet Boats mobile app

Try Jim brock

how do I contact him

I picked mine up from Jim done already but you can Google high flow dynamics and call Paul Kane he told me once I could by a set of dove a heads(better combustion chambers) for 14-1500 poted polishef ready to run. or 2200+ tax for aluminum heads and use the search bar for Jim Brock or looks in parts for sale he bumped some stuff yesterday I believe

Sent from my SPH-L900 using SoCal Jet Boats mobile app

I have studs n double springs and roller rockers on mine. Your heads are horse power thieves I use to have the same

Sent from my SPH-L900 using SoCal Jet Boats mobile app

Sent from my SPH-L900 using SoCal Jet Boats mobile app

I run the same heads... have the smog hump ported/removed an weld up the hole... I have scorpion non adjustable roller rockers on em to... work bitchn.

what size cam