Headers and ORY
 

I purchased a pair of Kooks headers and a offroad Y pipe used for my 99 z28...I took them to an exhaust shop and they're claiming they can't do the headers because there is no EGR on the new ones and it will throw my whole car off and it will run horribly, also the o2 sensors will have new positions which will apparently also throw off the car...HELP? lol is running the new kooks headers without EGR really that awful...I tried searching but didn't come up with much.

It won't run horribly, but it will run leaner, so you should get it tuned for EGR delete. Never heard of location changing will change the sensor read out, I would only think locating them down the exhaust further may get a different reading since the velocity speed of the exhaust is slower since the exhaust gases are slightly cooler then where their original location reads out.....but I highly doubt a few inches would have that effect. If that truely did that, I'm sure a reputable company like kooks would make sure to compensate for that, or build them to ensure original location.

What shop did you take this to?

Just remove the EGR and be sure to get a tune. The car will not run optimally with the changes you are making but it will not "throw the whole car off". O2 position will also be negligible. It's not like the sensors are being moved to the tailpipe.

I would suggest maybe just saving some money and installing these yourself unless you just want someone else to do it. If that's the case, you might want to get a second opinion/price from a reputable local shop.

Not sure if it will be needed but check to make sure o2 wire extensions will or will not be required so you can plug everything in.

It's at a Meineke in south plainfield...they absolutely refuse to install the offroad Y pipe because it has no cat...I don't think the longtubes will even bolt to the stock pipe...I just wish i could find a shop that would just take on the job...anyone know of a good place?

Is that the one off of Stelton? Maybe try the one off of Rt22 in Bridgewater? I use Mufflex located in Hamilton/Trenton area for exhaust work. They are not the cheapest but may be able to help you out. There are other shops but I'm not sure if they carry the same rule about the ORY. The headers will not bolt to the stock Y-pipe.

Tow it in and tell them its a race car

i'll end up taking it to Mufflex if they can do the job...haha i like the towing idea

IIRC it might be illegal for them to do it.

Yup it is. It's considered tampering with your emissions.

I'm down here in South Jersey, if you can't find someone up there, bring it down here to a real exhaust shop, he'd weld up the exhaust for ya.

I'll help do it with you. Took me three hours start to finish to put the headers in my car. That was messing around. Ls1 cars are easy to do headers on