Doug Thorley Shorty Headers for 2010 Camaro Installed -WOW!

[ssrsheaven]

[Rusky]

This question might be a little off topic but what actually makes the long tube headers illegal aside from not having a carb number?

[SubSolar]

Originally Posted by Rusky

This question might be a little off topic but what actually makes the long tube headers illegal aside from not having a carb number?

The longtubes move the cats back further. This effects emissions because the further the cats are from the engine, the longer they take to heat up on cold starts. They need to get to a certain operating temperature for peak efficiency of cleaning or something.

[Super83Z]

Originally Posted by SubSolar

The longtubes move the cats back further. This effects emissions because the further the cats are from the engine, the longer they take to heat up on cold starts. They need to get to a certain operating temperature for peak efficiency of cleaning or something.

Its only on initial start that it wouldn't pass emissions. The cats still work fine and would pass the sniffer no prob. Its the visual that usually fails it.

[radz28]

Less than $600 with CARB numbers and good (great) gains?... I wish the collectors provided a smoother transition into the head pipe, but if I can get about 15 RWHP with shorties, I won't complain at all. I'm sure that number will get better with FI too

[D1BADZ]

Originally Posted by radz282003

Less than $600 with CARB numbers and good (great) gains?... I wish the collectors provided a smoother transition into the head pipe, but if I can get about 15 RWHP with shorties, I won't complain at all. I'm sure that number will get better with FI too

these shortys really look promising especially for us cali guys, Im interested to tsee these # matched with the GMPP shortys when they come out.

[radz28]

Originally Posted by D1BADZ

these shortys really look promising especially for us cali guys, Im interested to tsee these # matched with the GMPP shortys when they come out.

I wonder why they didn't just carry the collectors further down to the flange and used the head pipes instead. It would seem to me that that would enable longer primaries and better scavanging for more power. It could be there wasn't enough space to do this though. Still - I'm not going to complain because these numbers show these babies are doing their job!

[SubSolar]

Originally Posted by Super83Z

Its only on initial start that it wouldn't pass emissions. The cats still work fine and would pass the sniffer no prob. Its the visual that usually fails it.

Yeah I know, that's why I need a CARB sticker before I buy in case some damn smog technician asks during a visual.

[WadeWilson]

I would have to assume by the previous posts by fellow cali people that I would have to go with the shortys due to cali's strict emissions standards. I've been curious but wasn't sure since I've never done any aftermarket mods to my current car.

[radz28]

Originally Posted by SubSolar

Yeah I know, that's why I need a CARB sticker before I buy in case some damn smog technician asks during a visual.

I'd try to insist on a metal tag affixed to the part in this case. I've been to more than one smog tech', let alone actual Bureau of Automotive Repair Referees, and most have insisted on metal tags ON the parts, even headers. I have a CARB decal for my dad's headers and that was almost not even good enough; I stuck it to the firewall in plain site. My point - get the tag and not sticker, if possible.

Originally Posted by Stang_Killer

I would have to assume by the previous posts by fellow cali people that I would have to go with the shortys due to cali's strict emissions standards. I've been curious but wasn't sure since I've never done any aftermarket mods to my current car.

If you want to remain "smog legal" in this crappy state, then yes. Shorties don't automatically give you a free ride though. Ebay has many shorties on it for cars, however, unless they actually carry CARB numbers, they are not legal. You can go to the BAR website and actually look up the EO numbers and see exactly what years and vehicles are covered under the EO numbers. My dad's been jacked due to false advertising because the vendor incorrectly listed his headers as being applicable to his truck, and it is actually mechanically the same as the year before, however, the CARB number does not cover his year, so technically, it's illegal. I've been fortunate enough to find friendly techs' though because of the sticker. They could verify the number to the truck if they wanted, but I've been lucky so far.

[SubSolar]

Originally Posted by Stang_Killer

I would have to assume by the previous posts by fellow cali people that I would have to go with the shortys due to cali's strict emissions standards. I've been curious but wasn't sure since I've never done any aftermarket mods to my current car.

Read up here:

http://www.racingbeat.com/emissions.htm

We Californians are in an awkward spot. If we want to stay legal, we basically have to either stick with light mods (intake, catback exhaust) or go nuts with a supercharger/turbocharger. If I lived in Texas, I'd be perfectly happy with medium mods, like longtube headers and full exhaust, maybe a bigger cam. That would give you well over 500 HP which is good enough for me. But nooooo...

[davidj]

Originally Posted by addictedtoboost

Your talking 17 hp and 35 lb torque from shorties through stock exhaust and cats.

The Stock manifolds can't be that bad.

MY calculator came up with 18.42hp. But seriously I would hope for DT sake that these numbers are right. You can get some really bad backlash from over stating your product nowadays. Especially how fast bad news travels on the net. Time will tell.

Originally Posted by D1BADZ

these shortys really look promising especially for us cali guys, Im interested to tsee these # matched with the GMPP shortys when they come out.

Its going to get real exciting as more companies come out with shorty's

[slowerthanu]

Originally Posted by davidj

MY calculator came up with 18.42hp. But seriously I would hope for DT sake that these numbers are right. You can get some really bad backlash from over stating your product nowadays. Especially how fast bad news travels on the net. Time will tell.



Its going to get real exciting as more companies come out with shorty's

They have been in the business for a long time and with the amount of "tuners" on this website, it would be suicidal to overstate your gains. Based on other tests of longtubes and exhausts, they don't seem to be overstating those claims.

The LS3 is a monster, I would bet that cost and time kept GM from going all out on the intake and exhaust. Hell, with an easy 426hp, did they really need to maximize their efforts their?

Its only going to get better with time. the public is treating the new Camaro like it invented time travel or something.

[KILLER74Z28]

WOW… If these are legit numbers this if very impressive for shorties. These headers will be a big time hit in smog states… Now all we need is some more runs from other tuners to back the data up.