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Hello,
I am really thinking about installing some headers on my stock 70 LS5 Chevelle. The exhaust manifolds that are on the car are not the right ones and will have to come off at some point anyway. This is a #'s matching style car that is driven just about every weekend. I am not too worried about changing gaskets if needed. Call me crazy, but I love stock appearing musclecars wih a nice sounding aftermarket exhaust along with headers. But I also like the simple and correct look of the factory exhaust manifolds. (I would have to find the correct ones of course..)
So my question is this... Who all runs headers on their mostly stock/restored cars?
[/ QUOTE ]A few things to keep in mind. 1-the headers won't add any power that you'll actually feel in the seat of your pants.2-the car will be a bit noisier inside, as sound dissipates out the tubes more than cast iron and will be heard through the firewall.3-because of the sound bleeding through as explained in #2, the exhaust out the rear of the car may actually be a bit quieter as a result
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I have to disagree. The headers will allow more air out of the motor which will push more air/sound through the mufflers and out the back.
As far as seat of the pants. I am thinking there will be a noticable difference. I have a fairly healthy motor that was built by Langenfelter years ago and it needs to breath more IMO.
[/ QUOTE ]The need for headers by your healthy Lingenfelter may be greater than the LS-5 in question. I was basing my "power" comment on that, from experiences in the past. Also, headers won't move any more air, just more efficiently. All exhaust leaving the exh. valve will eventually find it's way past the iron exh. manifold (where else can it go?). Also, it's known fact that a lot of sound will bleed through the thin tubes of a header, leaving less sound to make the trip to the rear of the car. I've installed a lot of headers yrs ago, when glasspacks were fairly common. It was amazing how many blown out sets got quiet after the header install. Hey, it's just all opinion, and that is mine