McJacks headers

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Apr 15, 2008 | 10:20 AM

rclinton

Thread Starter

Pro

Joined: Feb 2006

Posts: 718

Likes: 7

From: Jacksonville , NC

McJacks headers

Ran across this site with some interesting options for ram horn headers. Maybe a bit pricey but hadnt seen this company before.

http://www.vetteheaders.com/servlet/Detail?no=34

Apr 15, 2008 | 10:49 AM

V-Rod

Racer

Joined: Nov 2007

Posts: 279

Likes: 0

From: Forrest City Ar

I have talk to Jack several times on the phone but can't vouch for his products but is friendly to speak with.

Apr 15, 2008 | 02:52 PM

Greg73convertible

Advanced

Joined: Jul 2007

Posts: 82

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From: Lake Arrowhead CA

Small shop on harbor oc Ca, selling 9-10 cars , sold me a rebuilt rear end.that clunked. He farms his stuff out found myself at a closed gas station talking to "rebuilder" later found out rear end had bad yokes .This was in mid 90s but I'll never forget! yes he was nice on the phone but HE WILL NOT STAND BEHIND HIS FARMED OUT WORK

Apr 15, 2008 | 07:20 PM

Taijutsu

Drifting

Joined: Apr 2002

Posts: 1,738

Likes: 37

From: Stockton Ca

They look very nice, for that kind of money they should be!
The guys that port/polish the old rams horns claim a 4-8 hp gain.
These should do much better than that. Any guesstimates from the forum?

Ricisan

Apr 16, 2008 | 08:44 AM

jb78L-82

Le Mans Master

Joined: Oct 2007

Posts: 7,445

Likes: 971

From: Tennessee/Rhode Island

Quote:

Originally Posted by rclinton

Ran across this site with some interesting options for ram horn headers. Maybe a bit pricey but hadnt seen this company before.

http://www.vetteheaders.com/servlet/Detail?no=34

I have a 78 L-82 4speed, mostly stock with true duals (2.5in), monza turbos, no emissions at all, Holly 4175, and some other minor mods. I added McJack's shorty headers about 6 months ago and they are a piece of art. They are definitely an improvement over the stock manifolds and the exhaust definitely picked up some airflow at higher RPM's with zero engine or ground clearance issues which is why I was interested in them for the street. They hook directly up to stock pipes in the original location. I used lock washers and high temperature loctite on the header bolts and have had zero issues with leaks. The headers also have a nice thick flange for sealing and are custom made by Jack, not farmed out. Let me know if you want more feedback

Jun 4, 2008 | 10:25 AM

myc3

Racer

Joined: Oct 2006

Posts: 269

Likes: 7

Quote:

Originally Posted by jb78L-82

I have a 77 with a TH350 and would like to use the McJacks headers. Can you tell me what exhaust pipes are used to connect to the 2.5 outlet at the stock location and provide true duals (no cats). Can I use a front pipe from a 63 - 65 fulie and then any 2.5" pipe from a 68 - 72 automatic? I am unsure because the autos from that time period were TH400's. Don't know if that matters since the frames are all the same.

Jun 4, 2008 | 11:19 PM

FB007

Burning Brakes

Joined: Dec 2007

Posts: 952

Likes: 0

Quote:

Originally Posted by jb78L-82

The headers also have a nice thick flange for sealing and are custom made by Jack, not farmed out. Let me know if you want more feedback

Jun 5, 2008 | 01:45 AM

avner

Burning Brakes

Joined: Nov 2006

Posts: 954

Likes: 40

2022 C3 of the Year Finalist - Modified

I saw Hedman headers at summit they are cheaper.
http://store.summitracing.com/egnsea...=KeywordSearch
Avner

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Jun 5, 2008 | 07:20 AM

myc3

Racer

Joined: Oct 2006

Posts: 269

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Quote:

Originally Posted by avner

I saw Hedman headers at summit they are cheaper.
http://store.summitracing.com/egnsea...=KeywordSearch
Avner

I do not want full length headers. Looking for an exhaust system that will bolt up to "shorty" headers with a 2.5" outlet at the stock location. The McJack headers are the only ones I have found that have the outlet at the stock location.

Jun 5, 2008 | 08:11 AM

#10

avner

Burning Brakes

Joined: Nov 2006

Posts: 954

Likes: 40

2022 C3 of the Year Finalist - Modified

Quote:

Originally Posted by myc3

Try those
http://store.summitracing.com/egnsea...=KeywordSearch

Jun 5, 2008 | 04:26 PM

#11

js292

Burning Brakes

Joined: Jan 2005

Posts: 847

Likes: 1

From: spring branch texas

Quote:

Originally Posted by myc3

Won't the stock L-98 manifolds bolt in the stock location?

Jun 28, 2008 | 02:53 PM

#12

mcjackscorvettes

Advanced

Joined: Dec 2004

Posts: 58

Likes: 1

Quote:

Originally Posted by rclinton

Ran across this site with some interesting options for ram horn headers. Maybe a bit pricey but hadnt seen this company before.

http://www.vetteheaders.com/servlet/Detail?no=34

This Company is actually McJacks Corvettes. I got a set for my 82, and Jack really took the time to help me out. I wanted my AC Pump to be held in the same location as before, and his headers fit like a glove. They have a bracket that holds the AC Pump in the same spot as before. These headers directly replaced my 82 stock manifolds and hooked up in one afternoon. I can def. vouch for his headers.