bouncnbars

Hey guys, need some help. I have an '04 Tahoe with a 5.3. I want to put the fast 90mm intake on it, but I'm not sure if it will bolt up. It is a GENIII engine so you would think that all ls1 parts would bolt up to it. I have people telling me that it's like FORD and that the parts are just barely different from the ls1 to everything else. This is gonna go on my patrol truck, me being a cop, cause I'm tired of taking 1.5 miles to catch someone. Let me know what ya'll know. Thanks.

mullenh

iTrader: (1)

who told you to do this? it will run worse and take 3 miles. port the existing throttle body may be an option.

bygblok

iTrader: (4)

the stock 5.3tb is adequate for that motor easily. I'd take it and have it tuned before anything else. A little more fuel and ignition curve would help you beyond belief!!

HeapaShifter

iTrader: (2)

The intake will bolt to the heads, but that is really too big of an intake for a stock 5.3L. You might actually lose some power.

5.3LJimmy

iTrader: (10)

The throttle body will not clear the idler pulley that is directly under the stock TB. The fast intake and LS1 or LS6 intakes set the TB lower than the truck intake. And I agree that the intake is too large for your stock motor. Get it tuned.

STRIPSTAR

iTrader: (4)

yeah, not the way to get some go. Get some gears and a tune.