72 Lt1 Exhaust Manifolds

[Ron S.]

I have a 1972 Lt1 with headers and I wan't to restore it back to the proper exhaust manifolds. The engine code is CKY which I believe doesn't come with the K19 Air Injection Reactor System. Do I need 3932461 exhaust manifolds that haven't been pre drilled? Car was built in November 71, what dates would be correct also. Thanks Ron

[Paul O.]

Re: 72 Lt1 Exhaust Manifolds

Ron all LT-1's had AIR installed Fed or California. Paul 18046

[Ron S.]

Re: 72 Lt1 Exhaust Manifolds

Paul, thanks for the info. The NCRS Corvette Specification guide on page 66 engine codes shows CKY with no mention of K19 and CRT shows with K19, thats why I,am confused?

[Terry M.]

Re: 72 Lt1 Exhaust Manifolds

I don't know why Chevrolet Engineering did it like that, but some engine options list K19 as a separate option and for others it is included with the engine option, and of course there are those which have no K19 or AIR.

[Ron S.]

Re: 72 Lt1 Exhaust Manifolds

Terry, Your comment those without K19 air, does this include Lt1's, still confused? Thanks Ron

[Tom P.]

Re: 72 Lt1 Exhaust Manifolds

I don't know why Chevrolet Engineering did it like that, but some engine options list K19 as a separate option and for others it is included with the engine option, and of course there are those which have no K19 or AIR.

[quote] and an LS1 in a B4C -- one of 288 [quote]
B4C is the police pkg, right?
Soooooooooo, does that mean your B4C is in a Camaro?

[Terry M.]

Re: 72 Lt1 Exhaust Manifolds

[QUOTE=Tom Parsons (3491);489998][quote] and an LS1 in a B4C -- one of 288

B4C is the police pkg, right?
Soooooooooo, does that mean your B4C is in a Camaro?

Yes the 2001 Camaro is a B4C - one of 288. Came from the North Carolina Highway Patrol. LS1/auto. You should see the looks I get when I take it back to North Carolina. Those black Camaros are instantly recognized.
I am told there is dash camera video of the officer with my car chasing and catching motorcycles -- but they won't let me have a copy.
The service records show they changed the valve springs before they sold it. Why do you suppose that happened? LoL

[Joe L.]

Re: 72 Lt1 Exhaust Manifolds

Terry, Your comment those without K19 air, does this include Lt1's, still confused? Thanks Ron

Ron-----


ALL 1970-72 LT-1's were originally equipped with AIR. No exceptions. So, you need the manifolds with AIR fittings (PLUS, all the rest of the AIR components). Most of these are easily available in the reproduction, used, or rebuilt market. The problem will be an original diverter valve. That's where BIG $$$$ come into play.

[Terry M.]

Re: 72 Lt1 Exhaust Manifolds

I echo Paul and Joe -- ALL LT1s had Air Injection Reactor equipment from St. Louis -- NO exceptions.

[Ron S.]

Re: 72 Lt1 Exhaust Manifolds

Thanks to everyone, that answers my question once and for all. Ron