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Old 07-04-2008, 08:41 AM   #1
Brennan
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difference in 5.0 and 5.7 headers?

like the tittle says if i buy headers now for my 305 and when i swap in my 350 will i have to buy new headers?
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Old 07-04-2008, 10:38 AM   #2
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Re: difference in 5.0 and 5.7 headers?

Not if the headers you buy now are large enough to not choke a 5.7.
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Old 07-04-2008, 12:10 PM   #3
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Re: difference in 5.0 and 5.7 headers?

ok thats kinda what i thought thanks
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Old 07-04-2008, 01:18 PM   #4
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Re: difference in 5.0 and 5.7 headers?

1 5/8 or 1 3/4 header size should work for a 305/350.
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Old 07-04-2008, 02:05 PM   #5
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Re: difference in 5.0 and 5.7 headers?

The block is the same so headers should be the same.
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Old 07-04-2008, 02:06 PM   #6
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Re: difference in 5.0 and 5.7 headers?

Headers don't bolt to the block.
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Old 07-04-2008, 10:07 PM   #7
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Re: difference in 5.0 and 5.7 headers?

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Originally Posted by Apeiron View Post
Headers don't bolt to the block.
i didnt think that needed to be pointed out on a car forum, so am i right to assume that the exhaust ports on all heads are identical in space between them, location etc? at least for a chevy small block
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Old 07-04-2008, 10:26 PM   #8
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Re: difference in 5.0 and 5.7 headers?

Yes, as long as you stay away from exotic things like raised ports.
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Old 07-04-2008, 10:34 PM   #9
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Re: difference in 5.0 and 5.7 headers?

ok thanks now shifting gears a little bit would you recomend long tube or shorteys? you seem to have a bit of knowledge on the subject
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Old 07-04-2008, 10:46 PM   #10
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Re: difference in 5.0 and 5.7 headers?

If it's going to be street driven, long tubes aren't worth the extra trouble.
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Old 07-04-2008, 10:49 PM   #11
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Re: difference in 5.0 and 5.7 headers?

whats the extra trouble if i buy a whole new exhaust?
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Old 07-04-2008, 10:53 PM   #12
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Re: difference in 5.0 and 5.7 headers?

Do a search and you'll see.
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Old 07-04-2008, 11:04 PM   #13
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Re: difference in 5.0 and 5.7 headers?

ok i will thanks
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Old 07-04-2008, 11:15 PM   #14
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Re: difference in 5.0 and 5.7 headers?

Quote:
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Headers don't bolt to the block.
I never said they did.
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Old 07-06-2008, 08:27 AM   #15
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Re: difference in 5.0 and 5.7 headers?

Quote:
Originally Posted by Apeiron View Post
If it's going to be street driven, long tubes aren't worth the extra trouble.
only true if u have a lowered car. if my car was goin to be lowered i would have not run duals.

with my duals, i have no problems with clearence.it depends on how they are tucked. x pipes will yeild less ground clearence than an H-pipe. also the S-bends will have to be turned inward towards eachother.

u are however limited to what kind of mufflers u run. a thin style muffler will be best as far as mufflers go. i have dynomax bullets. loud mouths and bullets will give the best ground clearence.
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Old 07-06-2008, 09:46 AM   #16
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I agree with Aperion. You can't "buy" an exhaust system for long tube headers. Whatever you do will have to be fabricated, and since a typical aftermarket system designed for '86-'90 TPI single cat will handle a street 350 just fine, going through the fabrication hassle (and probably expense) of long tubes isn't worth it.
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Old 07-06-2008, 01:37 PM   #17
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Re: difference in 5.0 and 5.7 headers?

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only true if u have a lowered car. if my car was goin to be lowered i would have not run duals.
There are more hassles than just ground clearance. I have long tubes with dual exahust on my 84 because it's my track car. For anything else that was street driven I'd save a whole bunch of my time, aggravation and money, and just bolt up a good cat back with shortys.
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Old 07-06-2008, 03:32 PM   #18
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Re: difference in 5.0 and 5.7 headers?

i think i might just buy some shorties, i seen a set from summit for $90 and then invest in a nice 3" catback or something but from what ive heard shorties are not that much better then stock manifolds and honestly i find that hard to believe
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Old 07-06-2008, 04:13 PM   #19
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Re: difference in 5.0 and 5.7 headers?

You get what you pay for with headers, as with everything else. If the $90 ones you saw were Flowtechs (or Summit's own brand, which are made by Flowtech), you're better off spending a little more money on something else. Those ones only have 1 1/2" primaries and a poor Y pipe design, which is barely adequate for a 305, let alone a 350.
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Old 07-06-2008, 04:21 PM   #20
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Re: difference in 5.0 and 5.7 headers?

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Originally Posted by Apeiron View Post
You get what you pay for with headers, as with everything else. If the $90 ones you saw were Flowtechs (or Summit's own brand, which are made by Flowtech), you're better off spending a little more money on something else. Those ones only have 1 1/2" primaries and a poor Y pipe design, which is barely adequate for a 305, let alone a 350.
oh i wouldnt buy them i was just sayin thats efin cheap lol so is flowtech a stay away brand? i was lookin at a set of hookers on there for roughly $200
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Old 07-06-2008, 04:24 PM   #21
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Re: difference in 5.0 and 5.7 headers?

Flowtech/Summit headers are the bottom end of the scale. They're better than manifolds, but not nearly as good as more expensive headers.

A popular choice is the Hooker 2055s. About $450 gets you the Y pipe as well (keep in mind many headers don't include the Y pipe when you're comparing the price), and they'll work with all the factory emissions equipment.
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Old 07-06-2008, 10:14 PM   #22
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Re: difference in 5.0 and 5.7 headers?

Quote:
Originally Posted by Apeiron View Post
Flowtech/Summit headers are the bottom end of the scale. They're better than manifolds, but not nearly as good as more expensive headers.

A popular choice is the Hooker 2055s. About $450 gets you the Y pipe as well (keep in mind many headers don't include the Y pipe when you're comparing the price), and they'll work with all the factory emissions equipment.
thats sounds like a good deal i dont want to spend 2 days foolin around just tryin to install headers then take em out again when i drop in my new motor
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