logan_searching

iTrader: (1)

Hello i have a ls1 truck intake manifold with fuel rails 25317669 injectors and tb will this swap onto my ls4 (08 gp gxp) like the ls1/ls6 intakes do? It looks tall!!! what other modifications would it take to put it on and is it worth it? I have seen some tests where the truck intake manifold was better than the ls1 and compared to the ls6 until higher rpms.

ALL HELP IS APPRECIATED

Thanks Logan

Haulin_Ls4_GxP

iTrader: (1)

There wan never an ls1 in a truck. But no it wont fit

logan_searching

iTrader: (1)

but isnt that what Brian396 did was put an TBSS intake on his car?

https://ls1tech.com/forums/ls4-perfo...ke-option.html

Haulin_Ls4_GxP

iTrader: (1)

Nope it was too big. The end hits the power steeing pump.

Haulin_Ls4_GxP

iTrader: (1)

He was using an ls2 manifold. Also i know %100 that the TB will not work.

Brian396

iTrader: (3)

If you have a regular truck intake with a 3 bolt TB, then it should bolt on. The alternator bracket would probably need to be modified. The fuel rail is for a return system and won’t work. The dbw 78mm truck TB won’t work either, and you’ll need some sort of TB adapter to run the LS4 TB. Oh and I’m not sure how much hood clearance the other cars have. On the GXP the hood won’t close with the hood insulation on.

Nemesis350

iTrader: (11)

my understanding is that the tall truck intakes are indeed better for low end torque... but even the ls1 intake takes the cakes with solid top end horsepower, and for the low cost of getting one, most would do the ls1 intake swap both on trucks and ls4 cars