ls3 swap cai
Senior Member
Joined: Aug 2006
Posts: 807
Likes: 2
From: Ontario, Canada
Car: 1991 Trans Am GTA
Engine: LSX (swapping)
Transmission: 4L60E (swapping)
Axle/Gears: 2.73 Posi 10 Bolt
Re: ls3 swap cai
I used:
(1) 4" to 4" 90* rubber elbow
(1) 4" to 4" 45* rubber elbow
Section of 4" aluminum tubing
(5) 4" clamps
(1) K&N filter, I don't have the part number, it's a 4" inlet though, 7 or 9 inches long.

Bought all the parts from www.intakehoses.com
(1) 4" to 4" 90* rubber elbow
(1) 4" to 4" 45* rubber elbow
Section of 4" aluminum tubing
(5) 4" clamps
(1) K&N filter, I don't have the part number, it's a 4" inlet though, 7 or 9 inches long.

Bought all the parts from www.intakehoses.com
Thread Starter
Member
iTrader: (2)
Joined: Oct 2008
Posts: 154
Likes: 0
From: fresno ca
Car: 89 IROC-Z
Engine: 6.2 LS3
Transmission: MN12 T56 GTO
Axle/Gears: 3.73
Re: ls3 swap cai
Cheap spectre 4" filter
2x 4" strait connectors with T-bolts
4" 90* mild steel exhaust tubing
4" 45* mild steel exhaust tubing cut in half mid bend and welded to the 90*
Tight fit, looks great, works great, good MAF readings, reasonable IATs, inexpensive compared to a prebuilt piece
2x 4" strait connectors with T-bolts
4" 90* mild steel exhaust tubing
4" 45* mild steel exhaust tubing cut in half mid bend and welded to the 90*
Tight fit, looks great, works great, good MAF readings, reasonable IATs, inexpensive compared to a prebuilt piece
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Thread Starter
Member
iTrader: (2)
Joined: Oct 2008
Posts: 154
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From: fresno ca
Car: 89 IROC-Z
Engine: 6.2 LS3
Transmission: MN12 T56 GTO
Axle/Gears: 3.73
Re: ls3 swap cai
Cheap spectre 4" filter
2x 4" strait connectors with T-bolts
4" 90* mild steel exhaust tubing
4" 45* mild steel exhaust tubing cut in half mid bend and welded to the 90*
Tight fit, looks great, works great, good MAF readings, reasonable IATs, inexpensive compared to a prebuilt piece

2x 4" strait connectors with T-bolts
4" 90* mild steel exhaust tubing
4" 45* mild steel exhaust tubing cut in half mid bend and welded to the 90*
Tight fit, looks great, works great, good MAF readings, reasonable IATs, inexpensive compared to a prebuilt piece

Supreme Member
iTrader: (4)
Joined: Mar 2009
Posts: 3,079
Likes: 4
From: Pepperell, MA
Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: ls3 swap cai
I was looking at some of the cheap 4th gen / gto kits on ebay. you can usually find em for under $100. dont mind doing a little bit of cutting if needbe for that price.
Re: ls3 swap cai
If you can find one for that price, buy it. DIY things like mine are nearly that in materials
The two 4" bends are nearly $50, plus the $30 filter. Couplers $8 ea and clamps about $4 ea
Then I had to weld it together
The two 4" bends are nearly $50, plus the $30 filter. Couplers $8 ea and clamps about $4 ea
Then I had to weld it together
Junior Member
iTrader: (2)
Joined: Sep 2007
Posts: 82
Likes: 0
From: Eastern VA
Car: 92 Camaro RS
Engine: LS2
Transmission: T56
Axle/Gears: 12-Bolt with 3.73
Re: ls3 swap cai
I used an '06 GTO K&N kit for mine. I cut it just after the elbow that goes into the TB and turned it 180* to move the conical air filter down behind the driver side headlights. I made an airbox out of thin stainless steel to seal the cavity up to the hood. I can't get pics cause I'm overseas. I would be willing to bet that making your own out of separate components is significantly cheaper than buying a kit and modifying it though.
Thread Starter
Member
iTrader: (2)
Joined: Oct 2008
Posts: 154
Likes: 0
From: fresno ca
Car: 89 IROC-Z
Engine: 6.2 LS3
Transmission: MN12 T56 GTO
Axle/Gears: 3.73
Re: ls3 swap cai
I used an '06 GTO K&N kit for mine. I cut it just after the elbow that goes into the TB and turned it 180* to move the conical air filter down behind the driver side headlights. I made an airbox out of thin stainless steel to seal the cavity up to the hood. I can't get pics cause I'm overseas. I would be willing to bet that making your own out of separate components is significantly cheaper than buying a kit and modifying it though.
Supreme Member
iTrader: (4)
Joined: Mar 2009
Posts: 3,079
Likes: 4
From: Pepperell, MA
Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: ls3 swap cai
I'm playing guinea pig here, just ordered one of these:
http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWNX%3AIT
wont be on the car any time soon though - still has about a foot of snow on it....
http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWNX%3AIT
wont be on the car any time soon though - still has about a foot of snow on it....
Joined: Sep 2005
Posts: 6,258
Likes: 6
From: O'Fallon, MO
Car: 1991 Z28 convertible built 3/1/1990
Engine: Cammed 6.0L LSX
Transmission: T56
Axle/Gears: custom Ford 8.8", 4.10 gears
Re: ls3 swap cai
I'll post up the one I made for my car and the one on my dads car. They're a little different from each other as mine goes down through the sheet metal tray and in front of the wheel, his is completely in the engine bay. I'll post them later I'm out with wifey right now.
Senior Member
iTrader: (8)
Joined: Sep 2010
Posts: 732
Likes: 0
From: Cincinnati, Ohio
Car: '89 GTA
Engine: 5.7L LS1
Transmission: 4L60E
Axle/Gears: 9 bolt 3.27
Re: ls3 swap cai
Cheap spectre 4" filter
2x 4" strait connectors with T-bolts
4" 90* mild steel exhaust tubing
4" 45* mild steel exhaust tubing cut in half mid bend and welded to the 90*
Tight fit, looks great, works great, good MAF readings, reasonable IATs, inexpensive compared to a prebuilt piece

2x 4" strait connectors with T-bolts
4" 90* mild steel exhaust tubing
4" 45* mild steel exhaust tubing cut in half mid bend and welded to the 90*
Tight fit, looks great, works great, good MAF readings, reasonable IATs, inexpensive compared to a prebuilt piece

Is that thing at all awkwardly heavy pocket? I already have the same materials you used to make that at my disposal but I was afraid it would be a tad bit on the heavy side compared to one made out of the thin aluminum tubing for a relatively equal price.
Supreme Member
iTrader: (1)
Joined: Aug 1999
Posts: 1,387
Likes: 0
From: Northern NJ
Car: 89 Formula / 09 G8
Engine: LS1 / LS3
Transmission: M6 / M6
Axle/Gears: 3:42 / 3:27
Re: ls3 swap cai
Not the best pic, but you get the idea. 4" aluminum. Sounds like the worlds most powerful vacuum at idle, anyone else have the same sound?
Member
Joined: Aug 2006
Posts: 169
Likes: 0
From: Gällivare Sweden
Car: 1989 Iroc
Engine: LS2
Transmission: GTO T-56
Axle/Gears: 4:th gen Auburn with 3:73
Re: ls3 swap cai
Here some pics of my 4" aluminum tubing on my LS2 swap Iroc.
90 degree silicone bend and 45 degree alu tube. Huge K/N filter that gets some cold air from a hole in the drivers side battey tray.
90 degree silicone bend and 45 degree alu tube. Huge K/N filter that gets some cold air from a hole in the drivers side battey tray.
Re: ls3 swap cai
Is that thing at all awkwardly heavy pocket? I already have the same materials you used to make that at my disposal but I was afraid it would be a tad bit on the heavy side compared to one made out of the thin aluminum tubing for a relatively equal price.
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