MiaSSmaro98

iTrader: (9)

hey guys i seen that the vortec 6.0 exhaust maniolfs are a cheap way to going on boost.now wat years are they from or wat truck or suv are they from?alsoany part numbers will be nice and price or were can i get a set for cheap?

frcefed98

iTrader: (16)

4.8-6.0 are all good. If you can find em without the A.I.R/EGR holes those would be the ones to get.

Ebay is a good place to find em as well as here on tech, under the performance truck section. The F/S board on the truck board usually has a set or two from time to time.
I found mine there for 45 bucks

MiaSSmaro98

iTrader: (9)

thanks alot man

Country Boy

iTrader: (24)

Is using these just for the home made setups or do they flow better than the LS1 manifolds?

MiaSSmaro98

iTrader: (9)

i not sure if they flow better but the outlets point back and then when u invert them its easier to fab some pipes with a flange and ur done

SuperZ

iTrader: (2)

They flow better than LS1 manifolds do.Mine are from a H2 and they were $35 buy it now on ebay

NOSjohn

iTrader: (9)

We are using these on several projects for customers...see below. Cast manifolds are not only strong and heavy duty pieces but they flow very well. You cannot beat them for price versus reliability and strength. I believe W2W did a motor that went over 1300hp...with a set of truck mani's.

Country Boy

iTrader: (24)

I was curious for my TTi setup instead of using my LS1 pass. mani to use the truck mani. Thats why i wondered if the trucks flowed better.

NOSjohn

iTrader: (9)

IMO, the truck mani's will flow just as well, if not better than the TTi units. If I'm not mistaken and you have the TTi Street kit, that is a log manifold, correct? The truck manifold fits great on the passenger side but we had to remove the spark plugs on the driver side to bolt the truck mani. down.

Country Boy

iTrader: (24)

Yeah, I have the TTi street kit with the upgraded T76 log. I was just curious about the pass mani. Im still going to keep the log setup. I only want about 600 RWHP out of it.

If it flowed better Id get one since they are cheap.

NOSjohn

iTrader: (9)

Roger that...they are inexpensive. It wouldn't hurt to pick one up and try it.

FUroundeye

iTrader: (6)

Just be aware that the flanges on the truck manifolds are different than the LS1...

NOSjohn

iTrader: (9)

That is correct. Our flanges are CNC made to be an exact fit on the truck manifolds.

smokinHawk

iTrader: (48)

you would have to do to much work to get it to fit your tti street kit.
get the 2001-2002 manafolds for what your looking for, they flow a little bit better then the steel cast ones. (2000 might be the same as the later years, but not sure)

when i had my tti street kit i just got a pair of shorty headers for $100, that flowed alright.

Country Boy

iTrader: (24)

Ahhhh.. good catch about the flange! Ill stick with the stockers. I have a 2001 so its all good I dont know if I want to do the header route. I thought about it, but with the heat and pressure, I dont know if I want to chance any cracking or anything.

EightBall

I just got the stainless flanges from stainless works. Good stuff and they fit perfectly.

PurEvl

iTrader: (2)

i bought 2003 silverado ss ones brand new for like 240 bucks, had no emmisions crap an came with heat shields

MiaSSmaro98

iTrader: (9)

i had several member pm to sell me theres so im on a good route

MiaSSmaro98

iTrader: (9)

hey guys can u keep the A/C with the manifolds?because florida is really hot.im relocating the alternator to the top.

NOSjohn

iTrader: (9)

No, the passenger manifold (truck) comes right down into the area and fills the area where the A/C is located.

We are in the midst of jigging up a kit using our LS1 headers that will allow you to keep the A/C.