Big Block Exhaust Manifold/Header Recommendations
Thread Starter
Burning Brakes
Joined: Sep 2005
Posts: 769
Likes: 36
From: Goose Creek SC
Big Block Exhaust Manifold/Header Recommendations
Application is 68 Coupe. Engine is 468, intake is rectangular port casting number 3933163, heads are LS6 with 2.250/1.88 valves, cam is Lunati Hydraulic Roller 242/252 - .595”/.612”, carb is 800 double pumper, CR is 10.2:1, 4 spd, 3.70 rear. So what is the recommended exhaust set up for this combo? I HATE headers but realize this thing needs to breath.
Last edited by 68/BB; Aug 15, 2010 at 09:05 PM.
Race Director
Joined: Dec 1999
Posts: 11,096
Likes: 990
From: Sierra Foothills CA
Application is 68 Coupe. Engine is 468, intake is rectangular port casting number 3933163, heads are LS6 with 2.250/1.88 valves, cam is Lunati Hydraulic Roller 242/252 - .595”/.612”, carb is 800 double pumper, CR is 10.2:1, 4 spd, 3.70 rear. So what is the recommended exhaust set up for this combo? I HATE headers but realize this thing needs to breath.
Burning Brakes
Joined: Dec 2008
Posts: 971
Likes: 45
From: Middlesex NJ
Check out Mcjacks and Stainless works.
I hate headers too but didn't want to stifle my motor too much either. But I still didn't go full headers I went with something that would mount up to my allens stainless 2.5 chambered exhaust and still had 2" primaries. Allens also set me up with 2.5" mufflers from an earlier vette so I didn't plug it up there either. Again not optimum for HP but I like the fit better than full headers. To each his own.
These are my mcjacks, he also has manifolds. Jack claims an 18hp difference over stock manifolds.
http://www.vetteheaders.com/servlet/...ders%2C/Detail
http://www.vetteheaders.com/servlet/...olds%2C/Detail
These from stainless works look cool, however Ive never seen them on a car.
http://www.stainlessworks.net/cart/p...aff0e4a305c226
I hate headers too but didn't want to stifle my motor too much either. But I still didn't go full headers I went with something that would mount up to my allens stainless 2.5 chambered exhaust and still had 2" primaries. Allens also set me up with 2.5" mufflers from an earlier vette so I didn't plug it up there either. Again not optimum for HP but I like the fit better than full headers. To each his own.
These are my mcjacks, he also has manifolds. Jack claims an 18hp difference over stock manifolds.
http://www.vetteheaders.com/servlet/...ders%2C/Detail
http://www.vetteheaders.com/servlet/...olds%2C/Detail
These from stainless works look cool, however Ive never seen them on a car.
http://www.stainlessworks.net/cart/p...aff0e4a305c226
