i have 98 tahoe i want to switch to some performance header for more power ...the one on the truck r fine but they are cast and look ugly ....and weigh a ton..

 

Dynatech LT's w/ cats. High quality fit, finish, and all stainless steel. Full bolt-on kit, NO WELDING or FABRICATING REQUIRED! Bolts right up to your O.E. or aftermarket cat-back system.
They're not cheap, but they among one of the best kits in the market.
www.dynatechheaders.com
Did a quick search, they may not make a set for your model year. You will probably have to call them to see.
If not, Pacesetter may have something for you.
Note: do not use shorty style headers, they do not give you much HP gains to vouch for the money spent. Maybe 3-5 hp.
Look for LT (long tube) style headers.

Jim

 

Reference this thread, it has some usefull information about headers.

https://www.performancetrucks.net/fo...d.php?t=368126

 

I am using Hooker Competition Series Long Tube headers pn 2462 1HKR ceramic coated, 1 5/8" x 2 1/2". I got a bunch oif low rpm torque and power all thru the rpm range. For painted steel, $180, ceramic coated $330 and stainless steel $550.

If you are in an emissions tested area, you will need to weld a bung in 1 of the primary tubes on the drivers side to supply the EGR.

You will need to get the muffler shop to weld up some headpipes(connect headers to cats). I used dual 2 1/2" stainless tubiing instead of teh restrictive 1 7/8" stock headpipes that crimp down even smaller in some areas. I am also running dual 2 1/2" cats.

Hooker also makes a 1 3/4" primary x 3" collector Super Competition Long Tube, its pn 2806 $400 for painted, $700+ ceramic coated.

the Competition series just drop right in where the Super Comp series need some engine jacking. James B is using the 2806 Super Comps on his 99 OBS Tahoe.

peace
Hog

 

You're going to get a lot of recommendations for Pacesetters here.

If I was doing it, I would go with a complete Dynatech setup. That's what I've got on my Vette. Don't waste your time on mild steel as they require upkeep and will eventually rust out (I had a set of Edelbrocks on my Sonoma and they rusted out in 10 years), go with stainless.