BBC shorty headers
Thread Starter
Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
BBC shorty headers
Anyone know anything about these?
http://www.corvettecentralexhaust.co...ce_headers.php
I wonder how well they hold up, match to oem exhaust, or ease of install?
http://www.corvettecentralexhaust.co...ce_headers.php
I wonder how well they hold up, match to oem exhaust, or ease of install?
Burning Brakes
Joined: Jun 2010
Posts: 1,165
Likes: 93
From: Bellmore NY
I beleive those are the McJacks headers. When I first came on the board everyone used to swoon over these, but I havent heard boo about them in a long time. My understanding from the gossip is that these are super high quality, coated inside and out, and easy to install to stock exhaust, but spendy
Thread Starter
Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
They are not much more than oem GM marked manifolds so since I need a new system and really dont want to do long tubes. I either go manifolds or these. I am looking at that magnaflow X pipe system to go with it. I am guessing that these will need that heat riser spacer like the oem manifolds do.
Drifting
Joined: Jul 2008
Posts: 1,873
Likes: 27
From: Sonora CA
I have the McJack's headers, they are also copper coated on the inside, ceramic on the outside. Bolted up perfect to the engine and the stock pipes. And they will accomodate the heat riser, if you use one.
Burning Brakes
Joined: Dec 2008
Posts: 971
Likes: 45
From: Middlesex NJ
Ive got them they fit well, keep the heat down and are really well made. They add more perf. and keep the original exhaust. Talk to allens exhaust to see if you want a complete 2 1/2" exhaust at the same time as most systems neck down to 2" at spots. I went with the 2 1/2" system with components from a 1965 to keep the entire system 2 1/2" with chambered mufflers that are 3". Its very aggressive sounding but I love it.
They headers are very tight to my borgeson steering box at one spot but that was to be expected as the borgeson is just slightly bigger than the original box but since they are ceramic coated they protect the box better. I just ground the one bolt boss that was close to the header down on the borgeson box and now have plenty of room. Take a look at my pictures in my album and you can see them.
You need to use the riser spacer on the pass side and i would suggest copper gaskets and locking header bolts.
They have 2" primaries so they are better than stock manifolds for performance and the guy from mcjacks claims they produced 18 hp more than the stock manifolds on the dyno. Every engine is different but you cant beat them for fit and road clearance. I simply don't want to be scraping my exhaust all over the place, these cars are low enough as it is.
They headers are very tight to my borgeson steering box at one spot but that was to be expected as the borgeson is just slightly bigger than the original box but since they are ceramic coated they protect the box better. I just ground the one bolt boss that was close to the header down on the borgeson box and now have plenty of room. Take a look at my pictures in my album and you can see them.
You need to use the riser spacer on the pass side and i would suggest copper gaskets and locking header bolts.
They have 2" primaries so they are better than stock manifolds for performance and the guy from mcjacks claims they produced 18 hp more than the stock manifolds on the dyno. Every engine is different but you cant beat them for fit and road clearance. I simply don't want to be scraping my exhaust all over the place, these cars are low enough as it is.
Last edited by mysixtynine; Feb 18, 2013 at 12:09 PM. Reason: added text
