LT1 swap in 3rd gen, Header options??
TGO Supporter
Joined: Oct 2002
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From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Re: LT1 swap in 3rd gen, Header options??
All the 3rdgen V8 headers will work. Most will recommend Hooker 2055s or Hedman shorties.
Senior Member
Joined: Jul 2003
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From: Bellingham, WA
Car: 1989 RS
Engine: 3.1L + .060" overbore
Transmission: 700R4
Axle/Gears: 4.11, Auburn LSD
Re: LT1 swap in 3rd gen, Header options??
I put the round port shorties on my LT1 third gen. It hasn't leaked yet. Not the best choice since the LT1 is D-port, but eh, it works for now. Hopefully later on I can get a set of long tubes. I'm curious to see if someone did it right, and what they used.
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From: Carson, CA
Car: '88 GTA, 90 Formula
Engine: 5.7 TPI, fed growth hormones
Transmission: 700r4 4u2?
Axle/Gears: 9bolt
Re: LT1 swap in 3rd gen, Header options??
If the flanges are thick enough, you can gasket match all of the square port headers to the LT-1 D port shape. Buy and modify them before coating if you were gonna get coated headers.
Or the very nice 1 3/4 Shorties for 3rd gens that Dyno Don sells are already D-ports out of the box.
Good luck
TA
Or the very nice 1 3/4 Shorties for 3rd gens that Dyno Don sells are already D-ports out of the box.
Good luck
TA
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From: Cypress, California
Car: 1989 GTA
Engine: 369 TPI
Transmission: 4L60E
Axle/Gears: 3.70 Nine Bolt
Re: LT1 swap in 3rd gen, Header options??
Right. Dyno Don's will work on the D ports. Very good headers I might add.
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Joined: Oct 2007
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Re: LT1 swap in 3rd gen, Header options??
Is it possible to run the LT1 Kooks headers (especially with an aftermarket K-Member) or will they not fit without heavy modification? I mean, I know 4th-gen headers don't fit, but I'd like a stainless header bigger than just 1-3/4" and a stepped header is good for velocity and bolt-on simplicity. I haven't seen one way or the other whether or not the Kooks fit/don't fit.
Last edited by JakeFusion™; Oct 9, 2007 at 06:26 PM.
Senior Member
Joined: Feb 2005
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From: Albany NY
Car: 84 Trans AM (sold), 87 IROC, 09 C6
Engine: Lt1 in IROC
Transmission: 5 speeds
Axle/Gears: Moser 12 bolt tru tracker 3.42
Re: LT1 swap in 3rd gen, Header options??
I used the ceramic coated SLP"s. The primaries were pretty large and they fit pretty well too. They were costly: around $750
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