New LS2 intake and 90mm Nick Williams TB for the 408

[RedHeartbeat]

Well, I leaked it out earlier so I figured I'd start a topic concerning the swap from a stock LS1 intake with the factory 98 T/A throttle body to an LS2 intake with a 90mm Nick Williams throttle body on my 408 engine.


Special size O-Rings and fuel rail spacers for LS1 type fuel injectors. PN KATA4096
Fuel Injectors, Fuel Rail Spacer Kits & Fittings Katech has developed kits to adapt the Gen 3 LS1/LS6 style injector into the LS2 or LS7.


KAT-A4096 LS2 adapter kit

Price $24.99

An extension for the MAP sensor is needed. PN KATA4751
KAT-4751 LS2 / LS7 MAP extension harness
• Extends the MAP sensor wire to the front of the manifold
• High temperature loom
Price: $26.99

Both parts are available from SDPARTS.COM

Intake and throttle body acquired on LS1Tech




I'll try to remember to take some photos and document the process as I change the intakes out.

[SCIV]

I didn't tell anyone!!!

I will watch this closely!!

[NITROUS]

Are you going to have the LS2 intake ported to achieve maximum flow before you put it on?

[HotRodV6]

looks good. I have a stock Ls2 heads, and intake i was thinking about swapping, along with an MTI stealth cam.

Should be some nice power gains.

[Gator]

Nice! Im considering the same thing.....Does anyone make an aftermarket DBW TB that will mount to the LS2 intake...wonder if i could use a stock LS2 TB....

[RedHeartbeat]

The stock LS2 TB is DBW, it should work. Maybe Allen will see this and chime in.

[RedHeartbeat]

Original message deleted. The adapter was a wiring harness adapter. This makes it possible to use the factory LS2 TB on the listed vehicles. You still must have a 90mm intake.

KAT-4752 LS2 Throttle body adapter
• Install an LS2 throttle body in a LS1 / LS6 DBW vehicle
• Excellent for C5 or early CTS-V FAST 90mm manifold conversions

Price: $50.00

[SCIV]

but an LS2 intake will not work on an LS1 based motor (without mods), right?

[PurpleMinivan]

but an LS2 intake will not work on an LS1 based motor (without mods), right?

Thats correct. Could you port the intake on the heads to match?

[RedHeartbeat]

its a direct bolt-on. You lengthen the MAP sensor wires and shim the fuel rails up for the LS1 type injectors. The rest is just remove and replace plus make a throttle cable bracket. The LS2 uses the same heads as an LS6, 243 castings. Its all the same. LS7/L76/L92 is different.