Cord

iTrader: (2)

"Cheap" and the word "Marine" never go together. Add the word "header" and you have an impossible combination. The problem is that it will be impossible to match the header up to the existing tip location. They'll always be pointed at the wrong spot. So you're going to be looking for a new, low cost header. The cheapest one is by lightning. I think you'll be around $1,700 for a painted steel header. With their design you won't need a tail pipe so you'll be saving another $500 over other header designs. To lower the cost further you'll want to look for some aftermarket aluminum manifolds. The cast-iron ones are great for salt water and stock engine, but other than that they're a pretty crummy design. I think you can get a set for $1,200, but you'll need tail pipes. You can watch around for a used for alot less. The problem is that you're running small block and the rest of us are running big motors. Try to get ahold of a board member called "traviss". He did a small motor build-up this past year and can help you out.

HyperBaja

Ive talked to Travis.

The only way to get headers in there and have thru hull would be to have the headers upside down, like how they are in a car. Is that really a bad thing??

Waterfoul

Is upside down a bad thing? Ah....YEAH!! There are several reasons why this is bad. Water is one thing....it's gonna sit in the header....not good. Then theres the clearance issues....stringers and such are going to be in the way. I'd shop around for some used EMI's, Powerflow's, etc.... aluminum manifolds. They both make S pipes so you can run down to the Y pipe on silent choice systems. I'm pretty sure you can simply go thru the hull from here.....be about right for what you want.

HyperBaja

Thats what I thought.

I know that with the stock manifolds and risers on the V6 in it now, I would need 2 rubber hoses, tips and clamps and thats it. Im assuming it is the same on the V8.

Waterfoul

Only if you're going to go straight out the transom. You CANNOT put any bends in the rubber hose......it WILL burn even with a slight bend in it.

HyperBaja

How would Ido the exhaust then? It has to curve to go from the riser to DOWN towards the tips and then BACK to connect to the tips.

BGIII

iTrader: (3)

Upsidedown? Lightnings are no higher than the carb. Check out www.boatheaders.com

Lightning makes a small block header and I'll guarantee you they don't mount upsidedown. You can get them for quite a bit less than list price.


P.S. - check out their used stuff. looks like a customer hacked up some small block headers, might be the ticket for your application.

HyperBaja

BUT the dilema is, the headers would need to be upside down to even be near the tips. theres a swim deck on the back that they would need to go under. not saying i would mount them upside down, but that is how they would be even close to the tips.

Cord

iTrader: (2)

The headers need to go over the top. There will be a S shaped pipe that will connect the header to the tip.

HyperBaja

Would that be custom made up??
Anyone from Ohio region weld?