Hawks headers and th400
07-14-2012, 06:49 PM
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Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Hawks headers and th400
Putting the 6.0 into the 86 TA and I just thought last night after yankin the 5.3 out, man it is allot of Trans compared to the t56. I swear I saw a thread on this, but the search found nothing.
Anyone know how they fit with a LS and 400 Trans?
Anyone know how they fit with a LS and 400 Trans?
07-14-2012, 06:57 PM
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Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: Hawks headers and th400
Which headers do you have? 1-3/4 inch or 2 inch primaries?
I have 2 inch primary headers and have both y-pipes for manual and auto trans. I fitted my TH400 to the engine and the headers will fit as long as you cut off the ear from passenger side of trans. This is same modification the 4th gen guys do to put a TH400 in their cars. Requires the auto y-pipe (manual y-pipe hits trans). If you're making your own y-pipe then you'll have no issues.
I have 2 inch primary headers and have both y-pipes for manual and auto trans. I fitted my TH400 to the engine and the headers will fit as long as you cut off the ear from passenger side of trans. This is same modification the 4th gen guys do to put a TH400 in their cars. Requires the auto y-pipe (manual y-pipe hits trans). If you're making your own y-pipe then you'll have no issues.
Last edited by QwkTrip; 07-14-2012 at 07:03 PM.
07-15-2012, 10:34 AM
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Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Hawks headers and th400
They are 1 3/4. Y pipe...I have duals, they were on the 6 speed, they are going to be redone.
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