Wicked Mayhem

im getting headers made for my luv truck.. right now i have a 5.3 in it and it has a ls6 intake and cam.. im gonna keep that motor for now since i have it, but will be building a 6.0 for it in the future. diff. heads, cam, maybe fast intake etc.. what size primaries should i go with? it will have 3" collectors and 3" oval y pipe to 4" pipe probably.. just to be different. i hear that will handle up to 600hp, so thats more than itll have.

Lambert695

iTrader: (17)

I think the 1 7/8" headers are best for applications over 500hp.

The Alchemist

iTrader: (19)

1 7/8 have shown not to hurt on mild to wild stock displacment motors, but help when going with larger cubes. So get them in 1 7/8 now to have room to grow later.

01ssreda4

iTrader: (96)

i agree.....

the_merv

iTrader: (88)

I would go with a 1 7/8" if you plan on building it up.

Wicked Mayhem

sounds good to me.

dropping truck off saturday morning. should be done in a few weeks. i cant wait!

fatmat80

1 7/8 tsp here, no complaints..

soundengineer

iTrader: (16)

1 7/8 headres have been proven to make more power than 1 3/4 headers in all applications.. From stick cubes and no mods all the way up to big cubes and massive mods
the have also shown no loss of torque down low

in many tests the 1-7/8 headers followed the 1-3/4 headers exactly up to about 4000 rpm where the 1-7/8 headers started to pull away and make more power

if you can afford the cost difference... Buy the 1-7/8 headers
if you can't afford it... Save your money for a few more paychecks until you can

FirebirdSS

iTrader: (7)

Go with 1 7/8s
I dynoed this with just kooks 1 7/8 and filter on a ls1 automatic.

Wicked Mayhem

its getting 1 3/4 - 1 7/8 step headers

soundengineer

iTrader: (16)

straight 1-7/8 is better than the step up headers

Wicked Mayhem

and since i have time to decide, what would you all go with.. 3" y pipe to 3" duals with x pipe(if room) -OR- a 3" y pipe to 4" single pipe?

soundengineer

iTrader: (16)

there is really only a small difference in X and Y pipes...

My x pipes always made a little bit more power up top(like 5hp)
and my Y-Pipes always made more torque down low(similar 5-8tq)

I've never done the 3"->4"
for me its always ben 3" the whole way out.

Wicked Mayhem

id rather have some more torque.. so are you saying 3" y and 3" pipe is fine for say.. 500hp? i doubt the truck will have that much. wanting low 400, but i want room to grow incase without redoing ****.

soundengineer

iTrader: (16)

3" Y and #" all the way out is fine.

My setup that I'm currently building I'm expecting 480hp and 440ish torque when I'm all said and done....and then a little less once I throw on a 12 bolt or a ford 9"

Wicked Mayhem

sweet. 3" oval pipe is cheaper too. woot.

that hp/torque range will be fun in a 2500ish pound truck

BrianC98Z28

iTrader: (11)

Do the TSP 1 7/8 have the same fit and angles as pacesetters?? anyone know.

01ssreda4

iTrader: (96)

Here's mine. I just swapped from true duals to a 4 inch single.

https://ls1tech.com/forums/multimedi...pics-vids.html

bww3588

iTrader: (49)

do all 1 7/8 headers have 3.5 inch collectors?

soundengineer

iTrader: (16)

no..
the kooks I ordered are a 3" collector