I did a search, found a lot of stuff but not what i was looking for. I wanted everyone opinion on Headers... what brands and any noticable difference in oerformance or sound... what other mods are done to the car???

i have injen CAI and a custom bent 2 1/2in pipe from cat straight to a 3A Racing muffler... the only thing im worried about is that i won't pass the loudness law in my state im already on the edge of not passing... but i really don't care... i like noise form a toaster... it means its workin :rofl:

Thanks

I have an Injen CAI, DC Header, and custom 2" piped resonator-back with an HKS canister. With the DC header, I noticed better throttle response and higher mid to high-end torque. The low-end torque lose wasn't noticeable...

The "loudness" law mostly has to do with your 2.5" piping...as well as your muffler. I don't know much about 3A Racing mufflers, but the piping is definitely resonating sound louder than it should...

man i can't believe only one person replied and 63 people looked at this... thanks for the info mikochu, and it helps a lil but i really wish other people would reply... we are scion onwers and are suposed to help each other??? whats the deal? :tap:

Well, if you do a search for headers, it'll come up with a few threads. You have to pick out the information, though...

Well a freind of mine has a DC header , a Blitz axle back and an AEM cold air intake & the XB isn't that much louder than stock, he was slightly disappointed since he was looking for that tuner sound, another freind just did one of those universal mufflers and it was louder with no header, I will put my header on this weekend, but with the stock exhaust until my body kit arrives.

Well a freind of mine has a DC header , a Blitz axle back and an AEM cold air intake & the XB isn't that much louder than stock, he was slightly disappointed since he was looking for that tuner sound, another freind just did one of those universal mufflers and it was louder with no header, I will put my header on this weekend, but with the stock exhaust until my body kit arrives.
Yeah, like I said, you should notice better throttle response. Watch out for the header bolts though, they aren't the best quality...The OEM replacement bolts are different, too. I ended up using generic ones...

http://www.mikochu.com/car/headerinstall/bolt-comparison.jpg
http://www.scionlife.com/forums/viewtopic.php?t=41438

I run CAI from AEM, DC Sports Header... custom 21/4 pipe axle back with Magnaflow exhaust...

I am running this an automatic set up, notice a great improvement.

wow dude 2.5 inch pipe . is way too big for a n/a 1.5 but oh well your car will be insanely loud. even louder than it is now . i'm running megan racing header and 2.0 cat back with a glasspack resonator and an a-spec 2.5 muffler and my car is considered pretty loud probably still legal but on the line. you will be soo insanely loud think 110 or 115 db.

took it to a muffler shop they howed it was at 92db i think state law is 95db not sure though i was in a hurry to get to work that day... thanks for the info guys

92 huh? damn than my car must be only 90 it seems louder. . u got the stock resonator?

I ran 2.5 from the cat back. It is a good bit louder, but not illegal. Suffice to say, they here me coming. It does resonate at 3k rpm, so either go faster or crank up the stereo.

First thing, if you are running a canister, round muffler, you're exhaust will be LOUD. Its like running a resonator only. Why do you think all of those Hondas sound like tey do w/ those "fart" cans?

I'm running a Injen short ram, DC Sports header, and a custom 2.25 inch catback exhaust w/ a Magnaflow muffler, and resonated tip. It doesn't resonated in the interior cabin like some systems do that use 14 inch glass pack mufflers for resonators, and isn't loud since I'm not using a 5 or 6 inch round muffler that has a 4 inch core.

But then again, I'm sure some exhaust "expert" will chime in on how wrong my information is.

personaly i don't care how loud my car is... to me the louder it is the more heads i get to turn and look at my box... im using the two stock cats in a row on the car but after that its all free flow from there... my exhaust is nice... its not raspy and its deep tone... but if the headers are gonna push me over the laws limits im gonna have to find a way to resonate the exhaust without adding anything to block my flow

There's only one cat. and use a glasspack as a resonator to quiet it down if the header makes it too loud.

aren't there two o2 sensors?

aren't there two o2 sensors?
yes , before cat and after/mid cat.

took it to a muffler shop they howed it was at 92db i think state law is 95db not sure though i was in a hurry to get to work that day... thanks for the info guys

I have an xb with AEM CAI and the TRD exhaust No Header, and i pulled 95db.

I have a Goped Sport with K&N intake, HP carb, and X-Can exhaust, and i measured 116 db! :rofl:

my exhaust was 120 dB. 2.25 catback no resonator and Powertone Muffler. Well its on Pinkys car now =D. i like stock better.

Oh so pinky bought exhaust huh? Damn that's gonna be loud. 120 db is fun for like a week , I hope it comes with a silencer.

what silencer :rofl: . remember this use to be showpaojoe's exhaust. theres no such thing as "silencer"

Oh man, looks like Pinky will be getting some "pinks" soon.