so i have the option to buy a custom header

xstevex · Post by **xstevex** » Sat Dec 15, 2007 4:33 pm

but the outlet diameter is 3"

I have a chevy aveo, and i have my exhaust at 2"

having a header diameter at 3" and an exhaust at 2" isnt the best is it?

do you think i should buy it ($250 shipped), or should I wait to see if kinkymotors is ever going to build one (which he keeps saying he is, but it never happens). The header is well built, but im only concerned with the 3" outlet diameter...

what should i do?

Post by **PrecisionBoost** » Sat Dec 15, 2007 4:51 pm

You will be fine with a 3" outlet.... just go to a performance store and get an adaptor

Perhaps you will want to upgrade the rest of your exhaust at a later date to 2.5" ( which will definitly release some horsepower )

Is it a stainless header or a mild steel header?

$250 shipped is a very decent price

xstevex · Post by **xstevex** » Sat Dec 15, 2007 7:54 pm

Its stainless steel, and he painted it with 1200* paint

I ment to say my exhaust is 2.25"

so its a good buy then?

xstevex · Post by **xstevex** » Sat Dec 15, 2007 8:00 pm

I also can buy this for $140

do you think it will be worth $140 to upgrade from this?

the one I have now is custom made from a civic.. the piping is bigger than the throttle body, where as the AEM is the same size as the TB.

Worth it or not?

I dont think Id see that much of a difference, but id like to know what you guys think...

mikedudley17 · Post by **mikedudley17** » Sun Dec 16, 2007 4:41 pm

yes to the headers
no to the aem cai

your not going to notice anything with the aem cai versus ur current one. what u will prolly notice is the headers. so spend the 140 elsewhere, like royal purple oil, car wash, and some cookies.

daewoomofo · Post by **daewoomofo** » Sun Dec 16, 2007 5:14 pm

mikedudley17 wrote:so spend the 140 elsewhere, some cookies.

as in oreos?

Pir0 · Post by **Pir0** » Sun Dec 16, 2007 6:21 pm

140 dollars worth of oreos? Its a must for anyone with a car

xstevex · Post by **xstevex** » Sun Dec 16, 2007 8:07 pm

yeah just as i thought.... no to the intake

does anyone know if the paint will crack/peel off? Im not sure if he was using it with it painted....

I was going to get it ceramic coated by some place in town to cut down on heat, and also get a little bit of performance out if it.

daewoomofo · Post by **daewoomofo** » Mon Dec 17, 2007 1:23 am

the paint will prolly burn off. ive never seen a "regular" spray paint that will hole up to header heat. but i may be wrong

Post by **PrecisionBoost** » Mon Dec 17, 2007 4:44 am

Yes, it will burn off slowly.... but it's strange that he did that to stainless.... usually stainless is not painted/coated.

daewoomofo · Post by **daewoomofo** » Mon Dec 17, 2007 10:58 am

PrecisionBoost wrote:but it's strange that he did that to stainless

+1

xstevex · Post by **xstevex** » Mon Dec 17, 2007 5:11 pm

As far as I know it was stainless. thats what he said it was going to be before he actually made it

That is 4-hours after it was made.

so is it stainless, or something else?

Audacity Racing · Post by **Audacity Racing** » Mon Dec 17, 2007 7:50 pm

If it is stainless I'd be careful...

1. There is surface rust on the flange... this means it's either a very low grade stainless (Chinese crap) or it's just plain mild steel
2. There is contamination/rust in the weld beads... this means the welder used teh wrong procedure or filler for the metal. Yet again, stainless wouldn't do this unless low grade, or it just isn't stainless.

From looking at the material and the welding, it looks like it is mild steel. The striations on the pipe and on the collector piece look like aluminized steel to me. This is further supported by the weld contamination (it isn't possible to weld aluminized steel without contamination because the aluminum/silicon burns and displaces the shielding gas).

In the long run, you'd be better off with mild anyway. Stainless has a huge thermal expansion coefficient meaning it would warp (not maybe, it will... just give it time) and it also doesn't hold heat well. As a small performance upgrade, you'd be getting more for your money with a mild, and based on the price, that's what this is.

Yes, BBQ paint will peel off. If you want a permanent solution, paint it with a high grade caliper paint (NOT aerosol) or have it ceramic coated... both of which are types of enamel

xstevex · Post by **xstevex** » Mon Dec 17, 2007 9:35 pm

So you are saying if i end up not getting this header and make one from a shop in town, get it made with mild steel?
How come I always see headers made out of stainless steel?

Audacity Racing · Post by **Audacity Racing** » Mon Dec 17, 2007 9:48 pm

The primary gas that's coming from your exhaust is water. Mild steel rusts. When you open the pores of the metal with great heat and throw water into it, it will rust. This is why exhaust tubing is aluminized.

If you get a mild header, have it coated inside and out.

The aluminized steel in that manifold would do fine for its lifetime.