VolHawk

Looking at a full exhaust in the near future. I don't have the power to fully use 1 7/8 right now but I will in the future. Any reason not to go ahead with them?

flintwrench69

iTrader: (11)

A lil harder to get in & out, getting to the spark plugs is a lil harder

VolHawk

Nothing performance wise though? Just convenience

redbird555

iTrader: (14)

1-7/8 will perform better than 1-3/4 every time no down sides other than space

VolHawk

thanks bud

BrntWS6

iTrader: (7)

Yeah, when people buy 1 3/4" i just cringe. Made that mistake a well and ended up doing it twice.

99Bluz28

iTrader: (35)

Truthfully, clearance really shouldn't be an issue compared to 1-3/4", that's only 1/16" less clearance all around each of the tubes. So if clearance an issue between a companies 1-3/4" and 1-7/8" headers it's because differences in the bends angles, not tube diameter. The only area that I can see possibly having any possible clearance issues is around the collectors.

IMO, go with the best 1-7/8"you can afford. You'll be less likely to have clearance issues when the degree of the bends aren't choose by cost first; flow, an fitment last.

paradigmGT

Don't 1-7/8" headers lose power below certain RPMs vs 1-3/4"?

BlueBird346

iTrader: (13)

Nope. That's a common internet myth. Goes hand in hand with the "back pressure creates horsepower" bs.

1 7/8" will always gain power on these engines over 1 3/4", stock or not.

skiziFiziks

iTrader: (3)

Posting more details of your setup may help with suggestions. I, interestingly, read that in most cases there were no gains in power when going with 1-7/8's over 1-3/4's.

MikeWS6

So the rest of the setup doesnt matter? 1 7/8 are always better?

I still dont feel like swapping headers lol

redbird555

iTrader: (14)

Def not true. the only people who write that are ones that havent tried them. I witnessed it when I swapped mine to 1-7/8 arh's. A stock motor will gain hp every time

yes pretty much lol 1-7/8" will always outperform 1-3/4" however unless yours are bad I wouldn't necessarily change unless your after all the hp you can find on a 346 it would be worth 5-10 but more on a larger build.

VolHawk

Bone stock for now except the SLP otions. Getting ready to start things off with headers and true duals and a lid.

dhctss

iTrader: (3)

can't beat texas speed 1 7/8 headers. there stainless steel and fit very well with the revised y pipe. I had mine 2 yrs and they look great.

dr_whigham

iTrader: (49)

Then start it off right

Exactly. I went with duals myself bc tips on a Camaro look flat out stupid to me. However, after doing TSP Stainless 1 7/8" headers and their 3" duals, I knew I was absolutely and completely done, no matter what other mods I did to the car.

high n dry

iTrader: (18)

well, this made my decision Ez! 17/8 TSP's it is!!!

skiziFiziks

iTrader: (3)

Good to know, I was told that there were no gains to be had, by the maker of my swap kit. Which is why they had no option for 1-7/8". Shame to find out they would claim to have firsthand dyno experience confirming what they tell me, and it's false... (LS into 240SX if curious)

BrntWS6

iTrader: (7)

I personally gained 20rwhp 15rwtq swapping on my H/C/I car. Same brand header, same dyno.

flintwrench69

iTrader: (11)

That doesn't suprize me as that's how mine felt after the swap

red04montels

iTrader: (1)

You guys are talking the 1 3/4 to 1 7/8 swap gained you that much?

Is the theory similar on 90mm vs 102mm TB and Intake Manifold then? Or is 102mm not necessary until large numbers?