JDMricist_03

So my Dad has an 98 and has some nice American Racing headers and is trying to quiet down his ride and swap me for my OEM headers which is perfect because I'm trying to do a full exhaust but I noticed that there seems to be two different headers with two different part numbers. I don't have the exact part numbers but one is 97-01 and the other is 01-04. Are they interchangeable? Just to specify my dad has a 97 base and I have an 03 Z06 and I'm trying to see if we could swap headers.

Carl Timonen

If they are street headers, the difference are most likely the locations of the air injection fittings.

lionelhutz

Air injection fitting on the passenger side moves one tube and there would be a bolt-boss to hold the dipstick on the early model. Otherwise, they will fit and bolt-on just fine. Lots of people run the later design headers on an early car because they are more readily available and often cheaper too.

You could swap the dipstick to take care of that. You could also either get rid of the AIR or swap the AIR pipe that runs around the back of the engine to take care of the AIR.

Bill Curlee

I agree.. They wil fit and like "lionelhutz" stated, the main difference is the A.I R Tube header flange to piping location and the DIP STICK mounnt to the head location for the 2001-2004 cars. The early C5s mount to a bung on the header and the late C5s mount on the head.

For your Dads C5; GM made 3-4 different exhaust manifold to mid pipe configurations. The 98 is the very first design and the 04 is the latest design. You would have to give him your manifolds AND the midpipe to match up properly.

NOTE.. Some C5s have PUP CATS on the midpipe. The 98 DOES NOT. That could effect your emissions if your state cares.

This is an example of an 04 Vert LS1 with PUP CATS.



The 01 ZO6 had PUP CATS. The 02-04 ZO6 DID NOT have PUP CATs.

BC

JDMricist_03

Thanks for the quick reply guys! So I'm slightly confused about the dipstick, could I just leave mine alone or will the new headers get in the way causing me to have to move it? We do plan on swapping complete exhausts so the AIR flange isn't an issue.

Bill Curlee

The bottom of the dip stick tube slips into a whole on the oil pan and the top of the tube has to attach to something. The early C5s attach to exhaust tube #6 on to a small metal bung welded to that tube or in the case of the OEM manfold the bung is in that general area on the manifold.

The late C5 dip stick tubes attach to a mounting hole in the front section of the head between cyls 2&4.

Each dip stick and its tube are a matched set and MUST only be used as a matched set.

My stainless works headers has a bung on that tube so that the headers can use early and late dip stick tubes with out issue.

You could weld a stainless bung on that manifold tube in the correct spot easily and your dad can retain his OEM tube. Are you sure that his dip stick is not alread modified???



Bill

JDMricist_03

Ohhhhhhhh ok, you guys were talking about my Dad's side, I get it now. Since my (03 Z06) dipstick tube is attached to the head I just keep using that ignoring the mounting hole on his old style American Racing header but my Dad will need to weld a dipstick tube to my new style OEM exhaust manifold if his dipstick isn't already modified to new location. Thanks so much for clearing that up guys. Super appreciated.

lionelhutz

Or just swap dipstick assemblies so both cars are bolt-in.

JDMricist_03

Oh nice, if that's really possible then I'll definitely do that.
Thanks again for your help guys!

ttchybrid

What about exhaust port shape? don't regular C5's have round port and the "243" head on Z06's have "D" ports?? I could be wrong??

JDMricist_03

Wow I didn't know. I just did some research on that and you're definitely right.. Will that affect anything?

lionelhutz

The headers and exhaust manifolds are all the same regardless of the car being a Z06 or not.

JDMricist_03

So even though the Z06 has D-ports the headers are still round? I guess that makes sense. I've never seen any D shaped headers. Cool, it sounds like this swap won't be a problem then!

93Polo

http://www.ls1howto.com/index.php?article=29

Ls1howto has a small diy on updating the air pump tubes

I remember people making the extender:
https://www.corvetteforum.com/forums...-adapters.html

I would just update the dipstick and tube, yes they change in length with the version. A corvette junkyard may have one.

93Polo

The header is the same with Z06 heads or base heads.

JDMricist_03

Will I need this for the swap?

https://www.summitracing.com/parts/ado-219-346

Part Number: 12561494

lionelhutz

No, just swap air tubes between the cars.

JDMricist_03

Cool thanks, that's what I was hoping.

walleyejack

old post disregard