Conversions & Swaps LSX Engines in Non-LSX Vehicles
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Old Feb 18, 2019 | 04:38 PM
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Default D Port LS swap headers

Hi guys. I'm doing an iron ls1 swap with 243 heads which has D port exhaust chambers. Do anyone know who/where I can find a set of long tubes? All the pictures I've seen for the swap headers are oval port
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Old Feb 18, 2019 | 05:19 PM
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There is no such thing as an iron LS1. LS1's were all aluminum. Is your engine 4.8L, 5.3L, or 6.0L? These are the only cast iron block engines.
The headers are all oval port. They'll be fine in your app.
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Old Feb 18, 2019 | 06:07 PM
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Originally Posted by G Atsma
There is no such thing as an iron LS1. LS1's were all aluminum. Is your engine 4.8L, 5.3L, or 6.0L? These are the only cast iron block engines.
The headers are all oval port. They'll be fine in your app.
Im aware there is no iron ls1. Im taking a 5.3 and boring it out to ls1 specs. The 243s I have are D port exhaust I believe
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Old Feb 18, 2019 | 06:18 PM
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Originally Posted by 86CAMARO400HP
The 243s I have are D port exhaust I believe
Right. Most headers are round or oval port, and will fit your heads. 799/ 243's are very common.
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Old Feb 18, 2019 | 06:26 PM
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Originally Posted by G Atsma
Right. Most headers are round or oval port, and will fit your heads. 799/ 243's are very common.
Sorry in advance, im not familiar with mechanics much so I go by logic, but It wont cause any leakages or anything from using a different style port?
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Old Feb 18, 2019 | 11:10 PM
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Not at all. Those ports just have the bottom flattened "up" from the bottom, all within the header tube area.
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