C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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What headers for an '81?

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Old Sep 19, 2011 | 03:19 AM
  #21  
Tim H's Avatar
Tim H
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Summit headers:
[IMG][/IMG]

[IMG][/IMG]

Im done with the "Flowmaster" rant, They are what I recommend but people can buy what they want.

Last edited by Tim H; Sep 19, 2011 at 03:24 AM.
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Old Sep 19, 2011 | 07:42 AM
  #22  
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Originally Posted by terry82
well i just clicked on those to give the guy a web site to look at .i did not mean to recommend those headers.they have lots to chose from.sorry if i miss led anyone
Originally Posted by DRIVESHAFT
...If you are actually trying to improve performance, there are much better choices.
Sanderson's collectors are horrible. They are not a smooth transition at all.
They merge the tubes very abruptly which is going to cost you power.
They also call their cast iron manifolds “headers”!

Shorty block hugger type are for early rods w/ narrow frames. The guys who use them on C3 complain about melting motor mounts.
Note also how better shorty headers pull the center pipes forward so they are more equal length.
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Old Sep 19, 2011 | 07:54 AM
  #23  
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Originally Posted by htown81vette
I may just go with the system you got. I've got longtubes on my firebird, and on the street, they have given me more than just 1 bad day with how low they hang. I think shorties are the way to go especially with low riders like vettes. I know we are leaving some power on the table, but I'd rather have that than the busted collector blues.
You can get 3/4 length headers that are much better than shorties, don't go low & are good for about 400hp.



I have had the full length headers even before Walker bought them, formed Dynomax & no problems.
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Old Sep 19, 2011 | 09:02 AM
  #24  
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Dynamax ceramic long tubes 1 5/8" on my 81 with magnaflow mufflers and a X pipe. No fit issues on installation. Never have scraped the pavement with the collectors. 3 years on the car now and the ceramic coating shows no sign of wear.
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