Which heads are best for port & polish?

chevysten · 11-07-2009, 06:41 AM

I have the 706 heads on my 04/5.3,this winter I'm going to have the heads port & polished and have the intake port matched also.Should I look for another set of heads to get this done,or would the 706 heads be good enough?Mike

***SweetS10V8*** · 11-07-2009, 07:42 AM

There are better heads than those. Personally I would try to get a set of #243s or #799s

Do you have a budget?

FKNBMPN · 11-07-2009, 06:50 PM

There are better heads, but those are fine for the 5.3.

What are your power goals?

chevysten · 11-08-2009, 09:44 PM

Well I'm always on a budget!Lol.400+hp at rear wheels is my goal.Friend of mine guarantied me 75hp when p&p and will port match my intake for few hundred $.We'll see.Whats the diff.in the 243,799 heads compared to the 5.3 706 heads?Mike

***SweetS10V8*** · 11-09-2009, 08:02 AM

Quote: Originally Posted by chevysten

Well I'm always on a budget!Lol.400+hp at rear wheels is my goal.Friend of mine guarantied me 75hp when p&p and will port match my intake for few hundred $.We'll see.Whats the diff.in the 243,799 heads compared to the 5.3 706 heads?Mike

You will NEVER get 75hp on a P&P on your truck. The best aftermarket heads that are $2500+ heads give you 30-40hp. Tell him youll take him up on it. Have him pay for everything up front, and when you see 75hp then youll pay him back 100%. If I could make 75hp gains on a stock set of heads, I would quit my job and sit at home and port heads all day. Id have more money than I knew what to do with, so Id then buy a CNC machine to do my dirty work for me so I didnt have to work so hard anymore.....sounds exactly like the story of everyones CNC heads, huh?

Dont pay for a port match either, it doesnt do anything but make your wallet lighter. Put a few hundred dollars towards a good intake! Hopefully you have an LS6 or FAST?

243/799 heads flow better but have a slightly bigger combustion chamber, typically good for 15-20hp, and now come stock on 2007+ 4.8Ls/5.3Ls. Its part of why their power rating went from 295hp to 310hp

SS94S10 · 11-09-2009, 05:19 PM

I got a set of 799's. 33k miles. Pm me!
Warning though I'm in canada, hurts the shipping.

chevysten · 11-09-2009, 09:27 PM

Quote: Originally Posted by SweetS10V8

You will NEVER get 75hp on a P&P on your truck. The best aftermarket heads that are $2500+ heads give you 30-40hp. Tell him youll take him up on it. Have him pay for everything up front, and when you see 75hp then youll pay him back 100%. If I could make 75hp gains on a stock set of heads, I would quit my job and sit at home and port heads all day. Id have more money than I knew what to do with, so Id then buy a CNC machine to do my dirty work for me so I didnt have to work so hard anymore.....sounds exactly like the story of everyones CNC heads, huh?

Dont pay for a port match either, it doesnt do anything but make your wallet lighter. Put a few hundred dollars towards a good intake! Hopefully you have an LS6 or FAST?

243/799 heads flow better but have a slightly bigger combustion chamber, typically good for 15-20hp, and now come stock on 2007+ 4.8Ls/5.3Ls. Its part of why their power rating went from 295hp to 310hp

Yea I'm going to take him up on his offer.

11-07-2009, 06:41 AM	#1
chevysten Registered User Age: 45 Join Date: Dec 2007 Posts: 522 Location: Huffman TX User is: OffLine	Which heads are best for port & polish? I have the 706 heads on my 04/5.3,this winter I'm going to have the heads port & polished and have the intake port matched also.Should I look for another set of heads to get this done,or would the 706 heads be good enough?Mike
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11-07-2009, 06:50 PM	#3
FKNBMPN Registered User Age: 21 Join Date: Jun 2007 Posts: 47 Location: User is: OffLine	Re: Which heads are best for port & polish? There are better heads, but those are fine for the 5.3. What are your power goals?
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11-08-2009, 09:44 PM	#4
chevysten Registered User Age: 45 Join Date: Dec 2007 Posts: 522 Location: Huffman TX User is: OffLine	Re: Which heads are best for port & polish? Well I'm always on a budget!Lol.400+hp at rear wheels is my goal.Friend of mine guarantied me 75hp when p&p and will port match my intake for few hundred $.We'll see.Whats the diff.in the 243,799 heads compared to the 5.3 706 heads?Mike
	[Reply w/Quote]

11-09-2009, 05:19 PM	#6
SS94S10 Praise The Lowered! Age: 24 Join Date: Jul 2006 Posts: 88 Location: Lethbridge, Alberta User is: OffLine	Re: Which heads are best for port & polish? I got a set of 799's. 33k miles. Pm me! Warning though I'm in canada, hurts the shipping.
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11-09-2009, 09:27 PM	#7
chevysten Registered User Age: 45 Join Date: Dec 2007 Posts: 522 Location: Huffman TX User is: OffLine	Re: Which heads are best for port & polish? Quote: Originally Posted by SweetS10V8 You will NEVER get 75hp on a P&P on your truck. The best aftermarket heads that are $2500+ heads give you 30-40hp. Tell him youll take him up on it. Have him pay for everything up front, and when you see 75hp then youll pay him back 100%. If I could make 75hp gains on a stock set of heads, I would quit my job and sit at home and port heads all day. Id have more money than I knew what to do with, so Id then buy a CNC machine to do my dirty work for me so I didnt have to work so hard anymore.....sounds exactly like the story of everyones CNC heads, huh? Dont pay for a port match either, it doesnt do anything but make your wallet lighter. Put a few hundred dollars towards a good intake! Hopefully you have an LS6 or FAST? 243/799 heads flow better but have a slightly bigger combustion chamber, typically good for 15-20hp, and now come stock on 2007+ 4.8Ls/5.3Ls. Its part of why their power rating went from 295hp to 310hp Yea I'm going to take him up on his offer.
	[Reply w/Quote]