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Old 06-09-2003, 11:50 PM   #1
Billy G
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250 6 cylinder headers

Im curious if anyone here has ever put headers on a 250 6 cyl.
It's just a though, but I might do that on my 70 GMC.

I was shopping @ XXXXXtruckers online, and found a Hedman Header claiming to fit this 250.

If you have, what did you do about the stock intake manifold???

I'd greatly appreciate any comments or advise.

Billy G
My FAMOUS LAST WORDS...."Ima Gonna!!"

- 1970 GMC 1500 swb/step 250 I-6 3 spd - "The GEM"
- 1976 Chev Scotsdale swb/step 350/350 - "The JEWEL"
- 1982 Chev C-10 swb/step 250 I-6 3 spd -
- 2001 Chev Silverado LT -
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Old 06-10-2003, 01:45 AM   #2
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YEARS ago we used to split the exhaust manifold (amongst other things) to get them to breathe a little better. They also sounded great because the power pulses were separated from each other.
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Old 06-10-2003, 02:32 AM   #3
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I have a set of custom headers on mine, thats the only way i could get them to line up with my clutch and stuff. Its still very tight, but everything was planned good and it works like a charm, i have heard good luck with the clifford headers also and they would be cheaper than haveing them made. I love mine and makes a real distinct sound. :>
1967 Chevrolet LWB with built 292! 415 ft. lbs of torque, 4 speed :O with 27% overdrive too, 3.73 Posi. Frame and body done... getting painted!!!
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Old 06-10-2003, 11:50 AM   #4
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Clifford Headers and intakes come up on E-bay from time to time.

Offenhauser used to make custom intakes for the Chev I6 and I think there are a couple of Header companies too like Hedman and Hooker.

Hope this helps!

No such thing as a stupid question, right?
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Old 06-10-2003, 01:05 PM   #5
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i know at my advance auto parts they sell a dynomax header for my 250. for almost 200$
*69 GMC short bed stepside with a wimpy six that can barely pull itself.

*99 Chevrolet Camaro Z-28
1 Bad 5.7ltr LS1
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Old 06-10-2003, 02:03 PM   #6
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i priced out a set for my inline and it was gonna cost me $695 canadian. It's cheaper to buy them from the USA But i decided to scrap the inline and went with a 350 instead
My name's Tim and I'm a truckaholic

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Old 06-10-2003, 02:23 PM   #7
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I'll be putting the Stovebolt headers on my 250 within the next month or so. So far, the only problem I see up front is the poor casting. I'm mating this up with a Clifford intake and I can see that there will be some grinding involved to make them bolt up together. I don't know yet if I'll be able to afford dual exhaust all the way back for now, but will go with 2" when I can.

I guess the reason I went with cast iron headers is because of the reputation of the tube headers wearing out after a couple years. I've also heard of exhaust leak problems with the tube headers.

I figure I can always put the I6 performance stuff on the Camaro if I ever get a V8 for the truck.

1968 C-10 SWB, 5.7 Vortec/700R4/3.73 posi, Torch Red
1968 Camaro, 250/Powerglide, all original (No, I'm not gonna drop a 350 in it!...Jeez!)
2000 Honda VFR in the faster yellow!
2008 Husqvarna TE-610
2004 Kawasaki Ninja 250

1967 C-10 SWB 'Six Appeal'-Gone but not forgotten...

Last edited by Brad; 06-10-2003 at 02:28 PM.
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Old 06-10-2003, 07:26 PM   #8
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I want to do the I-6 headers and an intake.Ihave been looking at the 4bbl intake that uses a 390 cfm carb.I have also seen 2 singles intakes at swap meets.Since I haven't ever put one on a 6 let me know how things fit.
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Old 06-10-2003, 07:32 PM   #9
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This is may be completely unhelpful but I believe Sanderson makes or made cast iron headers for the I6. I can't remember where I saw that and it's possible that it's my "meds" talking but it might be worth googling....

No such thing as a stupid question, right?
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