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#1
10-03-2025, 07:52 PM
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header fit question (Doug Thorley tri-y)
would Doug Thorley tri y headers for a second gen firebird fit a 66 GTO ? I am mostly a first gen F body guy but have eyes on a 66 gto and a guy I know has these headers...
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#2
10-03-2025, 08:03 PM
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No header manufacturer grouped those two cars together on the same set of headers, so the only way you make them fit is with a hammer and a torch.
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73 T/A 455, 4speed |
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#3
10-03-2025, 08:08 PM
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the reason I thought there was a possibility is because the factory exhaust manifolds interchange between second gen Birds and A body cars.
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#4
10-03-2025, 08:15 PM
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Sure RA3 on 68-72 - A bodies and second gen F body inter change, but not with the early a bodies
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73 T/A 455, 4speed |
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#5
10-03-2025, 10:54 PM
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H-O Racing built their round port Tri-Y headers to fit both A-body and second-gen F-body cars so it might be worth a try with those Doug Thorley ones. If they’re a no go I’m sure they would be easy to sell.
H-O first marketed second-gen F-body D-port Tri-Ys but those weren’t made to fit A-body cars.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/3.08 2002 WS6 Convertible LS1/4L60E/3.23 1966 VW Type 2 Single Cab Pickup 140hp 2276 1956 VW Type 2 Panel Van 36hp 1200 1957 VW Type 1 Beetle 180hp 2276 |
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