Holley sucks🤬🤬🤬
Joined: Nov 2001
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From: Schiller Park, ILL Member: #317
I have no clue on the Fox body stuff though.
Teching In
Joined: Apr 2006
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Speed engineering headers do not fit on a foxbody when using holley engine mounts and factory k member. The holley mounts place the engine in the factory passenger offset and the speed engineering headers are designed to need more room on that side.
BUT, the speed engineering camaro headers fit great on my 74 Camaro using holley engine swap mounts. Good deal for $300.
BUT, the speed engineering camaro headers fit great on my 74 Camaro using holley engine swap mounts. Good deal for $300.
TECH Senior Member
Joined: Jun 2016
Posts: 22,292
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From: Central Cal.
I don't like it either, but I can see why they discontinued headers for '75-up applications.
Not true, they're discontinuing all headers. I'm in the middle of a lt1 swap in my 70 C10, I went with the Holley swap brackets and pan. At the the time I started they sold lt swap headers, now they're discontinued. This is for a vehicle that ended production in 1972.
TECH Addict
Joined: Dec 2004
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From: Florida
i wonder if that decision maker realized that the swap kits were engineered specifically to be a complete kit including headers. does this mean all the rest of the swap parts arent really useful anymore?
Joined: Nov 2001
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From: Schiller Park, ILL Member: #317
This does not seem to be the case at present. I just checked Holley's site for LS swap headers for a 1971 Camaro, there are four different header options currently in stock (3 LTs, 1 mid):
https://www.holley.com/products/exha...ust_manifolds/
Again, can you not use an LT header designed for a 1970-74 application? I'm assuming you have a later 2nd gen, but I don't see any reason why a 1975-81 Camaro couldn't use the earlier headers (and/or be converted to an earlier cross member if needed).
https://www.holley.com/products/exha...ust_manifolds/
Again, can you not use an LT header designed for a 1970-74 application? I'm assuming you have a later 2nd gen, but I don't see any reason why a 1975-81 Camaro couldn't use the earlier headers (and/or be converted to an earlier cross member if needed).
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Verdad Gallardo This does not seem to be the case at present. I just checked Holley's site for LS swap headers for a 1971 Camaro, there are four different header options currently in stock (3 LTs, 1 mid):
https://www.holley.com/products/exha...ust_manifolds/
Again, can you not use an LT header designed for a 1970-74 application? I'm assuming you have a later 2nd gen, but I don't see any reason why a 1975-81 Camaro couldn't use the earlier headers (and/or be converted to an earlier cross member if needed).
https://www.holley.com/products/exha...ust_manifolds/
Again, can you not use an LT header designed for a 1970-74 application? I'm assuming you have a later 2nd gen, but I don't see any reason why a 1975-81 Camaro couldn't use the earlier headers (and/or be converted to an earlier cross member if needed).
TECH Senior Member
Joined: Jun 2016
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From: Central Cal.
I just checked the Holley site. Long tubes are available for most pre-75 applications.
The swap kits for post 74 apps specify their cast manifolds as they will usually pass inspection as long as OEM configuration cats are in the system.
Holley doesn't want to get their tit caught in the legal wringer the way it looks
The swap kits for post 74 apps specify their cast manifolds as they will usually pass inspection as long as OEM configuration cats are in the system.
Holley doesn't want to get their tit caught in the legal wringer the way it looks
You can always eyeball the closest set and have them modified by a local welder.
I think Holley is able to sell either header drivers or passenger side so maybe mix-matching a set is a possibility?
I think Holley is able to sell either header drivers or passenger side so maybe mix-matching a set is a possibility?
Can you not use headers for a 1970-74 Camaro on yours? I'm assuming yours is a later 2nd gen, but aren't the underpinnings the same other than crossmember changes to accommodate the 1975+ picnic-table cat? If so, couldn't you just convert to the earlier style to accommodate dual exhaust (if you haven't already)?
I have no clue on the Fox body stuff though.
I have no clue on the Fox body stuff though.
I bought the Holley components so I didn’t have to go anywhere. Hell I could have had an exhaust shop do the exhaust cheaper. Just no good shops around me.
TECH Senior Member
Joined: Jun 2016
Posts: 22,292
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From: Central Cal.
If you find some headers that fit or decent manifolds, they can be hooked up to the system you bought. It shouldn't be complicated at all
I understand what you’re saying. And I don’t mean to come across rude
Joined: Nov 2001
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From: Schiller Park, ILL Member: #317
I don't understand the issue here. Why would LS swap headers for a 1970-1974 Camaro not be able to work on a 1975-1981 Camaro? Are we talking crossmember interference? If so, a swap to an earlier/aftermarket crossmember will cure this. I understand this is an unwelcome hassle, no argument there, but I just don't understand what would prevent this from being (relatively) easily fixable? Is there some other issue that I'm missing?
I don't understand the issue here. Why would LS swap headers for a 1970-1974 Camaro not be able to work on a 1975-1981 Camaro? Are we talking crossmember interference? If so, a swap to an earlier/aftermarket crossmember will cure this. I understand this is an unwelcome hassle, no argument there, but I just don't understand what would prevent this from being (relatively) easily fixable? Is there some other issue that I'm missing?
I don't understand the issue here. Why would LS swap headers for a 1970-1974 Camaro not be able to work on a 1975-1981 Camaro? Are we talking crossmember interference? If so, a swap to an earlier/aftermarket crossmember will cure this. I understand this is an unwelcome hassle, no argument there, but I just don't understand what would prevent this from being (relatively) easily fixable? Is there some other issue that I'm missing?
To show you how in-depth the development process was, we ended up with 1970-74 and 1975-81 specific engine mounts and long-tube headers to account for the subtle differences in the subframe and floor geometries between them and maximize ground clearance in both instances. If you design a header that is tucked up tight to the floor on a 75-81 car and try to install it on a 70-74 car the collectors will bang into the floor...unless you tilt the engine down at a steeper inclination angle, which impacts the U-joint working angles in a negative way. Both configurations provide maximum ground clearance and awesome U-joint working angles without any modifications needed to the floor sheet metal...even on moderately lowered cars.
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