69 442 exhaust manifolds ??????
#1
69 442 exhaust manifolds ??????
I have a few Questions about the 69 442 exhaust manifolds?
Do they flow as well as the 70's X Z ?
What letters are on then right and left manifolds?
How rare are they and going rate for a nice original set?
I thought I had a set still form the 80's but have not been able to locate them in storage.
Has anyone done a quality header performance comparison, against the W Z manifolds?
Do they flow as well as the 70's X Z ?
What letters are on then right and left manifolds?
How rare are they and going rate for a nice original set?
I thought I had a set still form the 80's but have not been able to locate them in storage.
Has anyone done a quality header performance comparison, against the W Z manifolds?
Last edited by Bernhard; May 15th, 2014 at 10:57 AM.
#2
First off 70s are W and Z,as are 69,but 69 drivers side is 69 only and has a heat riser flap. Expect to pay 350.00 plus for a perfect pair. 69 thru 72 are divided between the center exhaust. We did a test with the reprodution 2 1/2" exits and lost 50 Hp 50 Tq after changing from headers and that was on a 408 cuin,expect to loose more with the factory manifolds.
Greg
Greg
#3
Thanks for the reply Greg
That is very good info and that is a big loss in hp/tq.
Was the test on a engine dyno or chaise dyno?
Are you running headers or manifolds on your car?
How do you think a X pipe would impact the exhaust manifolds compared to the headers, would the X pipe be a wash or would the exhaust manifolds gain back some of there performance loss?
That is very good info and that is a big loss in hp/tq.
Was the test on a engine dyno or chaise dyno?
Are you running headers or manifolds on your car?
How do you think a X pipe would impact the exhaust manifolds compared to the headers, would the X pipe be a wash or would the exhaust manifolds gain back some of there performance loss?
#5
#6
Thanks Dave more good info on the subject.
75hp on a big inch engine ouch.
#7
Thanks for the reply Greg
That is very good info and that is a big loss in hp/tq.
Was the test on a engine dyno or chaise dyno?
Are you running headers or manifolds on your car?
How do you think a X pipe would impact the exhaust manifolds compared to the headers, would the X pipe be a wash or would the exhaust manifolds gain back some of there performance loss?
That is very good info and that is a big loss in hp/tq.
Was the test on a engine dyno or chaise dyno?
Are you running headers or manifolds on your car?
How do you think a X pipe would impact the exhaust manifolds compared to the headers, would the X pipe be a wash or would the exhaust manifolds gain back some of there performance loss?
Greg
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