C5Z + Speed Engineering headers
Thread Starter
Heel & Toe
Joined: Oct 2019
Posts: 19
Likes: 1
From: Onterrible, Canuckistan
C5Z + Speed Engineering headers
Hi guys,
Been reading lots of reviews on here about these headers. One common question / complaint seems to be integration with stock cat-back. With a Z06 you have a titanium exhaust to add to the complexity. Normally, I would just weld the connection point. Has anyone used these headers with the stock titanium cat-back? If so, how did you deal with connecting the speed engineering x-pipe to the factory cat-back?
Thanks,
Been reading lots of reviews on here about these headers. One common question / complaint seems to be integration with stock cat-back. With a Z06 you have a titanium exhaust to add to the complexity. Normally, I would just weld the connection point. Has anyone used these headers with the stock titanium cat-back? If so, how did you deal with connecting the speed engineering x-pipe to the factory cat-back?
Thanks,
Racer
Joined: Nov 2017
Posts: 449
Likes: 158
From: Aiken, SC
The Speed Engineering X-pipe doesn't directly connect to the cat-back. You have to cut the ends off of your existing X-pipe, whether it be stock or aftermarket, right after it bends outwards toward the cat back. The kit comes with reducers to clamp those 'legs' into and the existing cat-back will bolt to the same flanges it was already connected to
Burning Brakes
Joined: Dec 2017
Posts: 755
Likes: 272
When I installed these headers, I initially followed the process explained by INSTIG8R above. I was not satisfied with the results and had continual issues with proper sealing of the joints. Current state, I ended up purchasing a Corsa X-pipe (coupled with my Corsa Xtreme axle-back) and used that to replace the X-pipe section provided by Speed Engineering. As a result, I only had to reduce/couple 2 joints of exhaust piping that were a straight run. With SS 4" wide band clamps, I was easily able to seal those straight joints and overall exhaust alignment is significantly better.
That doesn't necessarily solve your issue, but it does provide a solid connection to the axle-back portion of your exhaust and eliminates the need to seal weird none-straight exhaust joints.
That doesn't necessarily solve your issue, but it does provide a solid connection to the axle-back portion of your exhaust and eliminates the need to seal weird none-straight exhaust joints.
Burning Brakes
Joined: Feb 2019
Posts: 1,028
Likes: 377
From: SW Ohio
One thing we had to do on some mustang exhausts back in the day was use this stuff on joints, which would help them seal up a little bit easier.
https://www.summitracing.com/parts/p...QaAoqNEALw_wcB
also, some dudes would get a set of these and tighten up the joints a bit during assembly as well.
I will be using both when I install my Speed Engineering headers and exhaust.
https://www.summitracing.com/parts/p...QaAoqNEALw_wcB
also, some dudes would get a set of these and tighten up the joints a bit during assembly as well.
I will be using both when I install my Speed Engineering headers and exhaust.
Last edited by CinciZ06; Dec 4, 2019 at 08:49 PM.
Intermediate
Joined: Jun 2016
Posts: 31
Likes: 9
I would like raise this thread again with a very specific ask about SE header kit and integration with 2001 C5Z cats.
Question: Can these SE headers be connected to factory cats with fabrication?
My 01 C5Z (pup cats and cats) will have a Corsa extreme cat back installed soon. So this is a Corsa X pipe attached behind primary cats.
-> JBA also makes affordable LTs that include connection pipes. Not sure they still sell them (ie part# 6818S) which includes connection pipes.
I would like to add LTs by connecting headers to factory cats (and removing pup cat section). In the end, really just want to salvage oem cats which I think will really take the edge of the volume of the Corsa Extremes and remove fuel smell.
Open to ideas
Thx
Question: Can these SE headers be connected to factory cats with fabrication?
My 01 C5Z (pup cats and cats) will have a Corsa extreme cat back installed soon. So this is a Corsa X pipe attached behind primary cats.
-> JBA also makes affordable LTs that include connection pipes. Not sure they still sell them (ie part# 6818S) which includes connection pipes.
I would like to add LTs by connecting headers to factory cats (and removing pup cat section). In the end, really just want to salvage oem cats which I think will really take the edge of the volume of the Corsa Extremes and remove fuel smell.
Open to ideas
Thx
Last edited by Suspekt360; Feb 13, 2021 at 08:59 PM.
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Advanced
Joined: Mar 2020
Posts: 75
Likes: 5
I would like raise this thread again with a very specific ask about SE header kit and integration with 2001 C5Z cats.
Question: Can these SE headers be connected to factory cats with fabrication?
My 01 C5Z (pup cats and cats) will have a Corsa extreme cat back installed soon. So this is a Corsa X pipe attached behind primary cats.
-> JBA also makes affordable LTs that include connection pipes. Not sure they still sell them (ie part# 6818S) which includes connection pipes.
I would like to add LTs by connecting headers to factory cats (and removing pup cat section). In the end, really just want to salvage oem cats which I think will really take the edge of the volume of the Corsa Extremes and remove fuel smell.
Open to ideas
Thx
Question: Can these SE headers be connected to factory cats with fabrication?
My 01 C5Z (pup cats and cats) will have a Corsa extreme cat back installed soon. So this is a Corsa X pipe attached behind primary cats.
-> JBA also makes affordable LTs that include connection pipes. Not sure they still sell them (ie part# 6818S) which includes connection pipes.
I would like to add LTs by connecting headers to factory cats (and removing pup cat section). In the end, really just want to salvage oem cats which I think will really take the edge of the volume of the Corsa Extremes and remove fuel smell.
Open to ideas
Thx
Burning Brakes
Joined: Sep 2014
Posts: 772
Likes: 96
From: carroll ohio
my long tubes extend into the area where the factory cats. are located. it's like the collectors are a little long which will push the factory cats back too far. i'll have to solve this problem by buying aftermarket cats. would really like to use the factory cats but they will only fit into the area where the frame flares out for them and the extra collector length messes that up.