LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

LS1 manifolds on 4.8/5.3

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Old Dec 19, 2010 | 09:21 PM
  #1  
bigal's1991's Avatar
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From: elizabethtown ky
Car: 1991 camaro RS
Engine: currently swapping 5.3
Transmission: 4l60e
Axle/Gears: soon to be 4:11
LS1 manifolds on 4.8/5.3

sry ive tried searching and cant find a striaght answer, im going to be puttin a 4.8 or 5.3 in my 91 camaro, stock k member, stock everything lol will the ls1 stock manifolds fit without modding them? im swaping a stock 4.8 or 5.3 nothing crazy jus a good sounding cam and carbing it. thank you for you help.
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Old Dec 21, 2010 | 01:32 PM
  #2  
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From: Midvale, UT
Car: 1991 RS
Engine: L03
Transmission: T5
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Re: LS1 manifolds on 4.8/5.3

98-02 Camaro/Firebird LS1 Manifolds will fit, truck manifolds will not fit.
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Old Dec 21, 2010 | 03:37 PM
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From: Pepperell, MA
Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: LS1 manifolds on 4.8/5.3

the fbody manifolds are one of the 3 most common options that will work: 1. stock mani's (get some 01-02's for best flow) & custom y pipe. 2. hawk's/sw long tubes, custom y. 3. modify a set of 3rd gen sbc long tubes to line up with the gen III/IV exhaust ports.
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Old Dec 21, 2010 | 03:43 PM
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From: Bertram (outside Austin), TX
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: LS1 manifolds on 4.8/5.3

Originally Posted by Falconiroc
98-02 Camaro/Firebird LS1 Manifolds will fit, truck manifolds will not fit.
If LS1 manifolds will fit a 4.8/5.3 and fit a truck LQ (and they do fit), then why truck manifolds fit the 4.8/5.3?

I know there is a height issue with hood clearance (but that can be handled by a new hood), but that has nothing to do with fitting on the block.
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Old Dec 21, 2010 | 03:46 PM
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Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
Re: LS1 manifolds on 4.8/5.3

truck manifolds won't fit a thirdgen chassis....
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Old Dec 21, 2010 | 03:53 PM
  #6  
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From: Bertram (outside Austin), TX
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Engine: L98
Transmission: 700R4
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Re: LS1 manifolds on 4.8/5.3

Originally Posted by xpndbl3
truck manifolds won't fit a thirdgen chassis....
How do you figure the CHASSIS into it? Hood I can understand, as I already mentioned, but the CHASSIS?

Besides...I've seen a 6.0 straight out of a truck into a 3rd gen, complete with pics, posted here on TGO.

EDIT: I see the "confusion" here. EXHAUST manifolds will not fit. Intake manifolds will. The OP only said "manifold" and "k-member". Intake yes, exhaust no.
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Old Dec 21, 2010 | 03:55 PM
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From: Pepperell, MA
Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: LS1 manifolds on 4.8/5.3

Originally Posted by Stephen
If LS1 manifolds will fit a 4.8/5.3 and fit a truck LQ (and they do fit), then why truck manifolds fit the 4.8/5.3?

I know there is a height issue with hood clearance (but that can be handled by a new hood), but that has nothing to do with fitting on the block.

the intake is too tall to fit a stock hood, exhaust manifolds dump into the firewall (not as easy a fix)

....and it looks like i posted right while you were. problem solved
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Old Dec 21, 2010 | 04:44 PM
  #8  
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From: Bertram (outside Austin), TX
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Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: LS1 manifolds on 4.8/5.3

I'm planning on put a stock 6.0 LQ under my hood, but I know I'll hafta change the exhaust manifolds out. The accessories MIGHT fit under my new hood too.
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Old Dec 21, 2010 | 08:10 PM
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Re: LS1 manifolds on 4.8/5.3

you guys make me laugh one guy is talking exhaust manifolds another intake manifold its funny as hell
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Old Dec 22, 2010 | 07:39 AM
  #10  
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From: Midvale, UT
Car: 1991 RS
Engine: L03
Transmission: T5
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Re: LS1 manifolds on 4.8/5.3

I know that one member has a stock Truck motor with full accessories fitting under a Stock third gen hood with a BBC Hood Cowl on it. I think the standard width cowl hoods will end up being just slightly too narrow, but wider cowl hoods may fit the alternator under it.
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Old Dec 22, 2010 | 11:04 PM
  #11  
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Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Re: LS1 manifolds on 4.8/5.3

BBC cowl hood? I'm curious - pics of this hood? You mention it being wider than a normal cowl hood....?
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Old Dec 23, 2010 | 12:01 AM
  #12  
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From: Bertram (outside Austin), TX
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: LS1 manifolds on 4.8/5.3

Originally Posted by Air_Adam
BBC cowl hood? I'm curious - pics of this hood? You mention it being wider than a normal cowl hood....?
I'm guessing he means this hood, that fashioned after the '67 Vette 427 hood.

Last edited by Stephen; Dec 23, 2010 at 12:11 AM.
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