New Small Block Headers

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The header that fit the best over and over again have been the headers sold under the Summit Racing brand header. Which, if I’m correct, are made by someone else as in a big name in the industry.

Flanges are 3/8 (love that!) so you’ll need an1/4 inch longer bolt, ARP has them, all tubes cleared on both sides.

Even better! The Summit racing dual exhaust kit bolted right up.
But the kit needs some minor trimming to fit best and suite the exhaust tips or where the exhaust pipe ends. Some points are a bit close but clear and they do not hit anything.

I did swap out the kit mufflers for the Summit mufflers that stay 2-1/2 inches in diameter pipe size inside the muffler. The tail pipes will be trimmed down later.

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rumblefish360 said:
My Blackjacks were a horrible experience.
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Theirs were my first. Alumi-Koted too.
Went in OK (67 A-body), but trying to tighten the bolts to the head, on both sides the tubes near t e collector contacted the chassis.
A couple weeks later my friend's brother is putting a non coated set into his full size Blazer. They don't fit either. But he was more determined than I was and exhanged them for another set, which did fit.
All I can say is a if header assembly jig is so bad that they won't always fit in a full size Blazer, sumptin is wrong!
 
All I know personally, I will NEVER install another set of headers on my driver A body cars that capture the steering linkage, NO CHANCE. Race car, different deal.

Hang low, cheapie design stuff, you all can have every set known to man, not for me.

I sold a crapload of blackjack headers over the years in the 80's. Remember when the alumi-Koat came out.
 
I loved that alumi-coat. Like ruff sandpaper in white.
 
pittsburghracer said:
I would have had them on already. Lol.
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not me. Can’t put them on in the showroom where the car hibernates in the winter. Unfortunately, I am not retired.
tranny is coming out for freshen and convertor getting adjustEd for this motor( never was)will be easier then to do all at same time,
probably end of March, first week or two in April.
have the Doug Thorley’s sold to my buddy who has his Scamp in my bay at work, awating my old 360 that was in my Dart.
once my car comes out, gotta have a place to put it..lol
 
That means there building them as fast they can get to them.
 
B3422w5 said:
not me. Can’t put them on in the showroom where the car hibernates in the winter. Unfortunately, I am not retired.
tranny is coming out for freshen and convertor getting adjustEd for this motor( never was)will be easier then to do all at same time,
probably end of March, first week or two in April.
have the Doug Thorley’s sold to my buddy who has his Scamp in my bay at work, awating my old 360 that was in my Dart.
once my car comes out, gotta have a place to put it..lol
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yeah but.... we 'need' to see them now! :rofl:
 
justinp61 said:
^^This^^ I don't think this header is marketed for the average beater. If they want to sell to the guys that make a lot of power they'll need a 1 7/8-2" though.
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Agree, AKA track car where we don't worry about low hanging headers.
We aren't supposed to be offended by these because they don't cover all applications ..lol we're supposed to just be happy that somebody else is offering something for our higher end/racer guys.
These don't compete with TTI in my opinion cuz TTI is the only company that offers that Middle Road header street car race car kind of thing...they wont lose any biz over this. Not for me, but I'm sure someone will benefit from them.
 
justinp61 said:
^^This^^ I don't think this header is marketed for the average beater. If they want to sell to the guys that make a lot of power they'll need a 1 7/8-2" though.
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not sure I agree with that.
pretty sure the West coast guy and his son on here who campaign stock and super stock A bodies( and those cars aren’t light by rule)….said he runs 1 3/4 headers on his 9 second super stocker.
gotta remember also these headers are only made for non offset stuff. Not more exotic heads.
I think you would be hard pressed to get many that would agree a header like this wouldn’t support 650 horsepower. And how many non offset heads are going to blow by that power wise.
I know when I had it, my w5 car went 135@3350 on super stock springs, that is 640, maybe 650 horsepower. That was TTI 1 7/8 headers with 3 inch standard street( 3 bolt) collectors.
I bet these headers are better than those…all day….
in other words , plenty capable of supporting anything a stock style head can dish out.
if I didn’t think so, wouldnot have bought them. I look at it as a good bit( hopefully ) more power that I don’t have to lean on the engine any at all to gather. No more rpm than currently running.
 
MOPAROFFICIAL said:
Agree, AKA track car where we don't worry about low hanging headers.
We aren't supposed to be offended by these because they don't cover all applications ..lol we're supposed to just be happy that somebody else is offering something for our higher end/racer guys.
These don't compete with TTI in my opinion cuz TTI is the only company that offers that Middle Road header street car race car kind of thing...they wont lose any biz over this. Not for me, but I'm sure someone will benefit from them.
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I street drive my car, and load it on a tilt deck trailer. I don’t see any issues with these headers at all
 
B3422w5 said:
sorry, I thought above you were talking about the headers I bought, and that they were for a track only car
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All good. I'm just staying on the thread starter about these headers by American Racing. I know plenty of people with low hanging headers that drive on the street.
 
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