Headers for a 305/5.0LX

[95Z212]

I'm looking headers for my 95 Mariah Z212 with the Mercrusier 5.0LX 305 V8. The boat does have thru hull obviously. Anyone know how much these bad boys will cost? A good friend just bought some for his 350 and was around $4,000 but the boat sounds amazing. I'm gonna throw this out there of how much would a 'plug and play' 454 be? May it be cheaper to drop a stock 454 in, than to get headers? Thanks guys, just got the magical 'OK' so I'm using it

 

[wca_tim]

Re: Headers for a 305/5.0LX

do you want to go faster or make noise?

 

[RepoMan207]

Re: Headers for a 305/5.0LX

$4k for headers?? I don't think so. imo a 454 is going be to too big. Obviously significant modifications will need to be made. Just the same, I priced a new modified 7.4 for my boat and it was around $7k....thats with an intake, and ign. system, on the other hand, a Ebay re-man/new your looking $3k to $6k. As far as headers.....Try these guys marineengine dot com. I just replaced my exhaust manifolds and risers on my 454 for under a grand. Good prices and fast shipping. They also offer aftermarkets if the OEM stuff is too pricey for you.

BTW, sweet boat. I like the Mariah's, there classy. How fast does your 305 push her at now?

 

[n2ostroker]

Re: Headers for a 305/5.0LX

If you want to spend money buy a Vortec 350 long block and drop in a new motor. Cost $2k or less and will give probably 75-100 more hp depending on what 305 you have Leave the manifolds alone for now. Money better spent elsewhere. The rest of your 305 stuff will switch over.

 

[dr_bowtie]

Re: Headers for a 305/5.0LX

yep they do have them and they are 4,000.00 for the pair....

http://www.marineengine.com/parts/m...s/mercury-mercruiser/mercury-catalog00328.htm

under a quicksilver part number...

 

[John_S]

Re: Headers for a 305/5.0LX

I would vote for what N2 proposes. If you wanted a little more, then maybe a 383. A 454 or more, you probably would want to go to a Bravo drive over your Alpha. Alpha might be iffy with a 383.

The headers will only give you a different exhaust tone.

 

[RepoMan207]

Re: Headers for a 305/5.0LX

yep they do have them and they are 4,000.00 for the pair....

http://www.marineengine.com/parts/m...s/mercury-mercruiser/mercury-catalog00328.htm

under a quicksilver part number...

Thats just crazy...

 

[cooter2506]

Re: Headers for a 305/5.0LX

That is an outragouse price for headers. But you might want to see why you are low on outdrive lube. Bottle looks low to me.

 

[95Z212]

Re: Headers for a 305/5.0LX

do you want to go faster or make noise?

Both

$4k for headers?? I don't think so. imo a 454 is going be to too big. Obviously significant modifications will need to be made. Just the same, I priced a new modified 7.4 for my boat and it was around $7k....thats with an intake, and ign. system, on the other hand, a Ebay re-man/new your looking $3k to $6k. As far as headers.....Try these guys marineengine dot com. I just replaced my exhaust manifolds and risers on my 454 for under a grand. Good prices and fast shipping. They also offer aftermarkets if the OEM stuff is too pricey for you.

BTW, sweet boat. I like the Mariah's, there classy. How fast does your 305 push her at now?

Thanks, I love this boat. Just need to have some help getting more go go juice I've been GPSed at 50 at sunset, so it was flat as glass. Full tank of fuel, and a co pilot (total weight between us, 300lbs.)

If you want to spend money buy a Vortec 350 long block and drop in a new motor. Cost $2k or less and will give probably 75-100 more hp depending on what 305 you have Leave the manifolds alone for now. Money better spent elsewhere. The rest of your 305 stuff will switch over.

Thanks I will look into that. Money spent elsewhere, like a Holley 4 barrol?

I would vote for what N2 proposes. If you wanted a little more, then maybe a 383. A 454 or more, you probably would want to go to a Bravo drive over your Alpha. Alpha might be iffy with a 383.

The headers will only give you a different exhaust tone.

The headers won't give ANY more power?

That is an outragouse price for headers. But you might want to see why you are low on outdrive lube. Bottle looks low to me.

The picture is when we first bought the boat, its been full. I've very picky on stuff like that. If anything is 1/4 inch low, it get topped off. Everything I own is very well taken care of.

 

[John_S]

Re: Headers for a 305/5.0LX

The headers won't give ANY more power?

Not on a stock 305 or a 350 for that matter. Going from thru-prop to thru-transom does not even provide noticible improvement in performance.


A 350 vortec will provide a noticable improvement in planning time and wot speed, but you will still probably be under 60mph.

 

[Utahboatnut]

Re: Headers for a 305/5.0LX

As mentioned your alpha won't hold up to much more than a 350, a 383 might be okay for a while but it WILL fail they just aren't built to handle the HP of a big block. So figure in a new outdrive with your costs. Money wise a 350 vortek would give the best bang for your buck.

 

[RepoMan207]

Re: Headers for a 305/5.0LX

Saw this on CL.....Repower with a 5.7 Alpha! http://nh.craigslist.org/boa/1365423733.html