where to find z/28 headers in 2023

[aris]

If your LS7 is stock, run high flow cats. If you have a head and cam package and track the car, you'll probably blow out the cats after a few events.



I ran high flow cats with my 1 7/8 ARH headers and ultimately blew out one of the cats after 2 track events (which also clogged up my mufflers).

[void_kp]

hey Joelster, I believe you... but which cat remover would you recommend? kooks come with high flow cats and I think they are welded into the headers

[void_kp]

I ran high flow cats with my 1 7/8 ARH headers and ultimately blew out one of the cats after 2 track events (which also clogged up my mufflers).

;( ;(

[rich2342]

Ideally, 2 inch LTH are best for the port shape of the LS7.

any 5th gen 1 7/8 LTH should also work however.

I had a swapped LS7 and reused my 1 7/8s from the LS3. Worked just fine.

[aris]

Originally Posted by void_kp

hey Joelster, I believe you... but which cat remover would you recommend? kooks come with high flow cats and I think they are welded into the headers

Confident that they are not welded onto the headers

[void_kp]

I checked and you are right. any recommendation on where I can find a bypass tube without having to spend a kidney for it?

[IdahoRob]

Originally Posted by void_kp

I checked and you are right. any recommendation on where I can find a bypass tube without having to spend a kidney for it?

My Kooks came with high flow cats AND blank tubes to replace the cats if desired.

[joelster]

Originally Posted by void_kp

hey Joelster, I believe you... but which cat remover would you recommend? kooks come with high flow cats and I think they are welded into the headers

They shouldn't be welded. When I ordered mine, I ordered the non-catted h-pipe or whatever it was.

[Coz3z3]

Originally Posted by rich2342

Ideally, 2 inch LTH are best for the port shape of the LS7.

any 5th gen 1 7/8 LTH should also work however.

I had a swapped LS7 and reused my 1 7/8s from the LS3. Worked just fine.

What brand did you use? And was it a crate LS7? Did you swap anything over from the LS3? The reason I ask is because our oil coolers are larger than one from an LS3 and that's what the headers hit when you just use any 5th gen header. The headers made specifically for the Z/28 (from Kooks and ARH) are designed to go around the stock oil cooler found in our cars. The ports are not the issue. It's the oil cooler. I was also told from Stainless Works that their headers will not work with the Z/28 because of this issue.
Now if you were to delete the stock LS7 oil cooler, any 5th gen header would fit just fine. I don't know if this is with every brand header out there, but I know I wouldn't risk trying it unless I was deleting the oil cooler.

[Toolie]

I guess billy boat exhaust isn't specifically for z28? 1-7/8 vs proper 2"

https://youtu.be/2iJBvHABbVI?si=JPrAPc7GOGkb0jRK

[rich2342]

Originally Posted by Coz3z3

What brand did you use? And was it a crate LS7? Did you swap anything over from the LS3? The reason I ask is because our oil coolers are larger than one from an LS3 and that's what the headers hit when you just use any 5th gen header. The headers made specifically for the Z/28 (from Kooks and ARH) are designed to go around the stock oil cooler found in our cars. The ports are not the issue. It's the oil cooler. I was also told from Stainless Works that their headers will not work with the Z/28 because of this issue.
Now if you were to delete the stock LS7 oil cooler, any 5th gen header would fit just fine. I don't know if this is with every brand header out there, but I know I wouldn't risk trying it unless I was deleting the oil cooler.

I used, 1 7/8 Stainless power headers.

Mine was wet sump converted LS7 so, I don't know how it would differ on the z's setup with dry sump.

The car did make good power cam only and when I swapped head and intake.