• Got the Contributing Memberships stuff finally worked out and made up a thread as a sort of "How-To" to help people figure out how to participate. So if you need help figuring it out, here's the thread you need to take a look at -> http://www.corvetteflorida.com/forums/showthread.php?t=3581 Thank you, everyone! Rich Z.

C5 hinson stainless steel headers installation

mrr23

The Alignment Guy

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had to removed the oil pressure wire and two ground wires bolted to block to get the driver's side in. on the passenger side there was a plastic connector that holds the positive and negative wires together i had to remove.
 

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make sure to install the driver's o2 sensor in before installing the header.
 

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the passenger front o2 connector was a bear to get reconnected. zip tied it so as not to touch header. driver's side was fine. no provision for the dipstick to get secured in place. the front pipes to x-pipe had to be persuaded into place.
 

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what it looked like from under car.
 

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only real gripe i had was why they decided to use these stainless band clamps instead of just providing 2 more of the other clamps. as you can see, the driver's side had very little holding the two pipes together due to the bracing.
 

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BTW, what size are the primaries on those headers? Been reading up on headers and the results between different size primaries, and I'm rethinking my idea of "upgrading" my 1 3/4" inch primaries to larger ones. For the sake of low end torque, I just may be better off sticking with what I've got now.

But was curious if this install went to large primaries (1 7/8" or 2"), and if so how that affected the performance of the car.
 
Features

Stainless Steel Construction and High Temp Ceramic Coating
Easy installation
1 7/8" Mandrel Bent Tubing for peak exhaust flow
3" Collectors
Lower under hood temperatures than non-ceramic coated headers
Slip fit collector for easy connection to a performance X-pipe
Ceramic Coated X-pipe for reduced center console temperatures
Direct fit application for all C5's- No fabrication required.

Includes

Ceramic Coated Stainless Steel Headers
Ceramic Coated Aluminized Steel Header Extensions
Ceramic Coated Aluminized Steel X-pipe
Aluminized Steel Rear Axle Back Connection Pipes
O2 Sensor Wire Extensions (x2) $50 value
Clamps

considering what you have, it would only help. it is 3" all the way to the muffler connection. then it necks to 2.5"
 
considering what you have, it would only help. it is 3" all the way to the muffler connection. then it necks to 2.5"

Maybe, and thinking going from a stock LS6 to a 427 with twin turbos this would be a no-brainer, but there is a real good chance it would only help at higher RPMs and take away torque on the low end. Did a lot of reading up on this situation concerning different sized primaries in headers and I actually went into it thinking I would only read GOOD things about my going to larger tubes. Didn't prove to be the case, however.

If my car were a dragstrip queen, spending most of the time in the upper rpm band, that tradeoff would be worthwhile to me. But it's not, and I really like what I've got right now with the rpm band I spend most of my actual driving in. Beefy low end torque feels GOOOOOD on the street.

Yeah, my LGM pro exhaust system is 3 inches from the collector to the catback pipes too. I'm thinking that necking down of the exhaust right before the tubes leading to the turbos might be somewhat beneficial because it would tend to accelerate the exhaust stream.

So did this guy go from stock exhaust manifolds to these headers?

I decided I didn't want to do any business with Hinson because of their disclaimer they put on the invoices specifically disclaiming ANY warranty on the products they sell. That was an issue when I went to buy the motor mounts from them, which I cancelled out upon viewing the invoice and went elsewhere for the mounts.
 
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