wmiller1337

If 4.3s and 5.7s are basically the same engine minus 2 cylinders as I have heard, then shouldn't the intakes be the same? All the 5.7 intakes say 5.7 only, and intake pickings for the 4.3 are very very slim... They look the same... Is it just the ID of the tube? Or are they just being mislabeled and I can use a 5.7 intake on my 4.3?

josgord98

You can only use a 4.3 intake on the 4.3 engine. The 5.7 intake is for the 5.7 or 5.0 because they are v-8 engines which will have two more intake ports on the intake.

wmiller1337

Haha, yeah I realize that man. Obviously the intake manifold is different, I was refering to the intake tube and box.. Companies like Volant, K&N, Spectre, etc make them.

josgord98

What is the intake tube and box? You mean like for the air filter?

josgord98

If so i really don't know cause my friend has a 97 Z-71 just like mine and my filter box is way different than his. Same year and motor

wmiller1337

Yes, the air filter is on the end of the intake. The intake tube runs from the throttle body to the MAF and the air box connects the MAF to the fender where it draws in air. And the system used in the 4.3 and 5.7 are identical as far as the eye can see. Only difference I could imagine is the ID.

RacerX

Shoould be the same. All they need to do is contain the MAF and run straight to the plenum on the intake or throttle opening. California cars have a totally different system than the other states.

wmiller1337

Yea I thought so. They looked the same. But nothing is listed as 4.3/5.0/5.7, it is all 5.0/5.7. So I was thinking the ID was different or something. Didn't know about California though, that's interesting...