what different sensors are involved with the exhaust system? is it just a.i.r. and the o2 sensor?

i've heard the a.i.r. sensor isn't important (no emmisions testing here), so is o2 all i have to worry about? where exactly does the o2 sensor (and any other sensors if i've missed some) screw into?

i'm about to order headers and full 3" exhaust, and just want to make sure that i order the right ones so i dont end up having to weld in a sensor because i ordered the part w/o a fitting for it or something

i know nothing about this, so if you feel like going into depth about this stuff, go right ahead

 

The O2 sensor is in the drivers side manifold. I've never seen anything regardig an a.i.r. sensor. when you get headers you will most likely need to have a bung welded in for your O2 sensor. if you want you can just rip out the entire air system (it really cleans up how the engine bay looks). I'm sure you looked at the tech article on how to do that. if you do remove the air system all you should need is, headers, Y pipe, high flow cat (or just a piece of pipe with the same diameter as the rest of the exaust system) and a cat back system. I'm not even going to try to say which is best because everyone has a different answer. hope this helps out some

 

AIR is not a sensor, its just a simple mechanical system that feeds air into your exhaust system to heat up the cat so it works better. People take this stuff off all the time, for a few reasons, and you lose nothing by removing it.

The O2 sensor is the only sensor in the exhaust system. The O2 sensor is threaded into the drivers side exhaust manifold, near the bottom. You'll know it when you see it.

If you have no emitions to worry about in your area, you'd be fine with headers with no AIR tubes. All you need is headers with an O2 sensor hole (bung) on the drivers side header. I think all the major header manufacturers make a set for the 3rdgen with an O2 sensor bung in them, like Hedman and Hooker, and some others.

Hope that all made sense!

 

yup, that's all i needed to know, thanks alot!

 

I don't know enough about TPI systems and PROM codes, so I don't know if this applies to MAF or not.

https://www.thirdgen.org/techbb2/sho...hreadid=213310

 

i'm debating on whether to keep the a.i.r. system or not. i have no emissions testing so that's not a problem...i just need to read up on it a little bit to see how difficult it is to eliminate the a.i.r system.

if it's too much of a hassle, i'll just leave it and order my exhaust stuff to be compatible with a.i.r.....where exactly does a.i.r. enter into the exhaust? is it only at the cat?

if the only place i need to unhook the a.i.r. system to replace my whole exhaust system is on the cat, i'll prob. just keep it.

edit: guess i'll go w/ an Eastern Universal hi-flow cat...about $35 on ebay and comes w/ or w/o an a.i.r. fitting. just need to find out if a.i.r only connects to the cat, or if it connects to another part of the exhaust system

 

I don't know if its the same with TPI but if its like my TBI the difficulty of getting rid of the air system is about as difficult as changing the belt. and if you use bolt cutters to cut the air lines so you can get them off its really really easy.

 

well if it only connects to the cat, i'll get a cat w/ an a.i.r fitting, and just leave the a.i.r. system intact.

if it connects to the headers or y-pipe or anything else though, if i'm gonna have to unhook and reconnect like 4 fittings, i'd rather just scrap the a.i.r., but If it's just the one connection to the cat, it'd be simpler to leave it

 

for fittings there should be one on the cat and the 8 on the exaust (4 on each side of the engine). scap it you won't regret it. Just my opinion though

 

damn, well if i'm gonna have to unscrew 9 fittings in hard to reach places, i dont think i want to screw them all back in. guess i'll look into what's involved in ditchin the a.i.r. system

so can you order headers with or without a.i.r. fittings, the same way you can w/ a cat?

 

you can definately order headers w/o the air tubes. to get rid of the air system just look at the tech article; the only thing it didn't cover is how to plug the holes when you get rid of the tubes. personally when I cut mine w/the bolt cutter I just left them crimped in there. if you wanted to plug them though I think they are about a 1/4 npt, don't quote me on that I'm not sure

 

alright, doesn't sound like too big of a deal..thanks for the info....so i guess i'll be going with Hedman non/a.i.r. headers and y-pipe, Eastern Universal hi-flow non/a.i.r cat, and a Banks catback

thanks for the info everyone

 

Notice that all the people who are saying they deleted A.I.R. with no problems have TBI.

Not saying you're going to screw yourself up, but you may want to make sure you understand the consequences with TPI.

 

In my own defense the first thing I did say is "I'm not sure if its the same with TPI"

 

No problem, Red, just making sure that message was received.

 

i read through the sticky a.i.r. article and it seems like it'll be fine just ditch the a.i.r. system and cap off the fittings

new question...i'm probably going to buy some ACS coated Hedman headers off of ebay (company in link above) and am wondering if this y-pipe will work with it.

headers: here (Hedman part #68460)

y-pipe: here (Flowtech part #11102y)

i don't know if a y-pipe is a y-pipe, or if you have to be sure to get one that's matched to your header brand/part number

i'll probably end up just getting a y-pipe added to my header order from ACS even though it's a little more expensive than the flowetech so i'll be sure it will fit right, plus it'll cut down on shipping to order both from the same place. i'm just curious about mix & matching headers and y-pipes though

edit: last thing, i think. the o2 sensor connects to the headers, right? and it's only 1 sensor? and aftermarket headers usually dont come w/ an o2 bung, right?