BOLO

iTrader: (40)

Is there any gains to be made upgrading from 1 3/4" to a stepped 1 7/8" long tube headers on a built 383? Thanks in advance.

robsquikz28

iTrader: (246)

There is now with your setup. Having what you have I would definitely step up the game and get LPPs or knock offs to have them stepped!

CamaroRacing12

iTrader: (5)

i dont have any proof but imho the more flow the better on any platform.

maybe mike v. will chime in i know he is upgrading this season to 1 7/8th headers.

Lawhead

iTrader: (14)

Id like to know this as well i got a pair going on the car

96TransAmboosted

iTrader: (8)

I'm pretty sure the stepped headers are TUNED correct? If so they will work much better on your set-up. Might even get 10hp or so out of it.

355z28

iTrader: (8)

Id like to hear from some one with expierience on this as well. I have some hooker super comps Ive been thinking about changing to some lpp ebay knockoffs that are 1 3/4 to 1 7/8. Not sure if its worth it. But who knows

BOLO

iTrader: (40)

Who makes 1 7/8" long tubes for the LT1's anyways? Kooks are way up there $$

robsquikz28

iTrader: (246)

Just get the LPP or ebay knock off speed daddy.. they will suffice

flyinZ

iTrader: (15)

Hedman does, Butch. They have either the stepped version like what I have or just the straight 1 7/8 with a 3.5" collectors.

BizZzatch350

iTrader: (33)

I just bought a set of Kooks 1 3/4 to 1 7/8 stepped, really nice headers. I got mine from Speed Inc

nitrous2fast

iTrader: (2)

they will with a large shot of nitrous. you might lose a few hp on the low end though.

James Montigny

iTrader: (13)

Stepped headers will help with reversion.
If you're running a cam with a decent amount of overlap, you should see some gains.
The increased diameter won't hurt either with the setup you have.

See this thread -> https://ls1tech.com/forums/lt1-lt4-m...primaries.html
When you see Ed weight in on something, it's a safe bet that he knows what he is talking about.

I need to get a set of 1-7/8" for mine too.
For some reason I kept telling myself to wait until I broke the motor in first ... bah.

Wicked94Z

iTrader: (26)

a motor with the right amount of overlap that is correctly placed will not have an issue with reversion, so I don't see that as a benefit. Besides, the actual head port would do far greater things to kill reversion if it were an issue. There is more power in proper equal-length primaries, collector design, diameter and length than just simply throwing on bigger headers. Just utilizing proper length primaries and collectors could net a 3-4% improvement in HP without changing the actual size of the pipes! Also a true merge collector (not sure the ebays or lpps would qualify) will allow you to get away with a smaller primary for better low-midrange and with no penalty up top.