My bird has dual cats and I am looking for a set of headers and I am really interested in the SLP headers now and I see there is no conversion for dual cats. Also do high flow cats make a difference on horsepower out put?

 

Anyone there?

 

If you are looking for a complete exhaust system for your 'Bird, good luck! I don't know about your year, but for mine (1992) there is no such animal. The only option you have is to buy a complete exhaust system for a single converter car. (Those they have (or had) from SLP among others.) But you could do it the hard way if you want. This would be to have the headers installed (by yourself or someone else), have new pipes cut and bent to fit between the headers and the dual converters, and then go with a cat-back system.
As far as the difference in horsepower, I believe that in stock configuration it is worth 5 to 10 hp to have dual converters.

You might want to consider keeping the dual cats. Supposedly very few of the 305 motors had that option, and it is very expensive to replace it with a genuine GM part. (Currently $895 from Year One) Perhaps replace the cats with modern high-flow ones, and see how it helps with a free flowing exhaust. If you do so please post the results.

 

Hedman and Edelbrock are the only ones that appear to make dual cat headers at this point.

 

I'll get back to you with the results, but its going to be a while tho. As far as Five7kid, I could have sworn I saw a header kit from slp for dual cats on the site a while ago but now its gone but I could have read the site wrong.

 

SLP quit offering headers for dual cats. Used to, yes, but no more.

 

Also, no more headers install kits from SLP for the 1991 1/2 to 1992 5.0 dual converter cars. I found one through Year One, however. Not sure why there is a differencein the headers for dual cats, but I do know that there are individual pipes from each side of the engine. On the single cat cars there is a Y-pipeand then a single pipe goes back to the converter and then to the muffler.

Also, check into having your headers coated by a place like JetHot. I have a set of 1 5/8" SLP headers that should get sent out to them this winter. I think the price should be about $200.00, but call them to be sure.

My 1992 LB9 Formula was in a small accident last year, so a paint job is first priority. Along with that goes replacing the original T-tops, weatherstriping, and a few more things. (To make the old pieces not look ratty and old.) Since I was hit in the rear, I need to replace both tailpipes, and I'll replace the original intermediate pipe as well. (But keep the Flowmaster muffler I had put on.) It is just gonna take a while, so I'm getting some of the parts now while they are still available.

 

What does jet hot do for headers, (stupid question) Im going to guess and say keep the heat down.

 

The coating from JetHot is actually supposed to do three things: #1 It looks better than bare metal. #2 It protects the metal of the headers (Less likely to or won't rust at all) #3 Supposed to keep the temperature in the engine compartment down by keeping the headers from radiating the heat. Among other things this is supposed to keep the airflow in the headers and pipes up. As air cools it contracts. If the volume of the pipe is constant (like it is in a pipe) then the velocity will decrease.Less efficient airflow through the pipe. Less scavenging of the cylinder, less efficient combustion. (Less horsepower, too.)

 

Sounds like another thing I am going to add to my list of things for my formula.