Header install on my 99
#1
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Hey, it'* been a while! Just stopping by to say hello and to show off my latest crazy mod for my naturally aspirated Bonneville. It'* a lot of fun to work on it with my friends.
I love the clearance we have on the front and back! Headers are generally easy, apparently. Bill was nice enough to give me some good tips, like the header install and then the crossover placement, possible O2 sensor conflict(*), etc. I think I'm ruling out possible issues as they come along. This is pretty cool! First, here'* a picture of the front clearance:
![Name: CIMG0005-8.jpg
Views: 24
Size: 171.5 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24966d1501267962-header-install-my-99-cimg0005-8.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
Loosened crossover pipe bolts:
![Name: CIMG0006-7.jpg
Views: 29
Size: 109.6 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24967d1501267962-header-install-my-99-cimg0006-7.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0007-5.jpg
Views: 27
Size: 137.1 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24968d1501267962-header-install-my-99-cimg0007-5.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0009-4.jpg
Views: 32
Size: 111.9 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24969d1501267962-header-install-my-99-cimg0009-4.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0011-9.jpg
Views: 35
Size: 76.3 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24970d1501267962-header-install-my-99-cimg0011-9.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0013-6.jpg
Views: 25
Size: 139.5 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24971d1501267962-header-install-my-99-cimg0013-6.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0012-10.jpg
Views: 26
Size: 363.3 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24972d1501267962-header-install-my-99-cimg0012-10.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
I had to remove my throttle body to make it easier to reach one bolt.
![Name: CIMG0008-9.jpg
Views: 25
Size: 185.6 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24973d1501267962-header-install-my-99-cimg0008-9.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0010-10.jpg
Views: 27
Size: 174.9 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24974d1501267962-header-install-my-99-cimg0010-10.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
Then, I removed the front exhaust manifold.
![Name: CIMG0015-7.jpg
Views: 27
Size: 132.6 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24975d1501267962-header-install-my-99-cimg0015-7.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
Here'* a friend of mine climbing into the engine bay and pretty easily breaking loose the rear bolts. i was very surprised.
![Name: CIMG0016-5.jpg
Views: 32
Size: 162.7 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24976d1501267962-header-install-my-99-cimg0016-5.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
We got to the downpipe from beneath the car:
![Name: CIMG0017-6.jpg
Views: 29
Size: 89.8 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24977d1501267962-header-install-my-99-cimg0017-6.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
It turns out that CarX lied and actually didn't weld the rectangular flanges together! That'* excellent!
![Name: CIMG0018-7.jpg
Views: 24
Size: 392.5 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24978d1501267962-header-install-my-99-cimg0018-7.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
And here are some interesting pictures.
![Name: CIMG0019-7.jpg
Views: 30
Size: 212.4 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24979d1501267962-header-install-my-99-cimg0019-7.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0020-8.jpg
Views: 32
Size: 178.0 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24980d1501267962-header-install-my-99-cimg0020-8.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0021-6.jpg
Views: 30
Size: 227.5 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24981d1501267962-header-install-my-99-cimg0021-6.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0022-8.jpg
Views: 21
Size: 148.6 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24982d1501267962-header-install-my-99-cimg0022-8.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
Here'* another friend of mine. I bought him a chocolate malt ice cream thing so that he would help me break out some of the bolts for the rear head.
![Name: CIMG0023-7.jpg
Views: 29
Size: 194.9 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24983d1501267962-header-install-my-99-cimg0023-7.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0024-10.jpg
Views: 27
Size: 226.0 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24984d1501267962-header-install-my-99-cimg0024-10.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![](https://i897.photobucket.com/albums/ac171/rjordanovic/CIMG0025-7.jpg)
![Name: CIMG0026-9.jpg
Views: 26
Size: 168.7 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24985d1501267962-header-install-my-99-cimg0026-9.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0027-8.jpg
Views: 26
Size: 166.1 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24986d1501267962-header-install-my-99-cimg0027-8.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
Yes, I didn't finish it, but it was a fun day nonetheless. Here'* a sneak peek of the header install:
I love the clearance we have on the front and back! Headers are generally easy, apparently. Bill was nice enough to give me some good tips, like the header install and then the crossover placement, possible O2 sensor conflict(*), etc. I think I'm ruling out possible issues as they come along. This is pretty cool! First, here'* a picture of the front clearance:
![Name: CIMG0005-8.jpg
Views: 24
Size: 171.5 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24966d1501267962-header-install-my-99-cimg0005-8.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
Loosened crossover pipe bolts:
![Name: CIMG0006-7.jpg
Views: 29
Size: 109.6 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24967d1501267962-header-install-my-99-cimg0006-7.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0007-5.jpg
Views: 27
Size: 137.1 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24968d1501267962-header-install-my-99-cimg0007-5.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0009-4.jpg
Views: 32
Size: 111.9 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24969d1501267962-header-install-my-99-cimg0009-4.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0011-9.jpg
Views: 35
Size: 76.3 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24970d1501267962-header-install-my-99-cimg0011-9.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0013-6.jpg
Views: 25
Size: 139.5 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24971d1501267962-header-install-my-99-cimg0013-6.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0012-10.jpg
Views: 26
Size: 363.3 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24972d1501267962-header-install-my-99-cimg0012-10.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
I had to remove my throttle body to make it easier to reach one bolt.
![Name: CIMG0008-9.jpg
Views: 25
Size: 185.6 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24973d1501267962-header-install-my-99-cimg0008-9.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0010-10.jpg
Views: 27
Size: 174.9 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24974d1501267962-header-install-my-99-cimg0010-10.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
Then, I removed the front exhaust manifold.
![Name: CIMG0015-7.jpg
Views: 27
Size: 132.6 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24975d1501267962-header-install-my-99-cimg0015-7.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
Here'* a friend of mine climbing into the engine bay and pretty easily breaking loose the rear bolts. i was very surprised.
![Name: CIMG0016-5.jpg
Views: 32
Size: 162.7 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24976d1501267962-header-install-my-99-cimg0016-5.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
We got to the downpipe from beneath the car:
![Name: CIMG0017-6.jpg
Views: 29
Size: 89.8 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24977d1501267962-header-install-my-99-cimg0017-6.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
It turns out that CarX lied and actually didn't weld the rectangular flanges together! That'* excellent!
![Name: CIMG0018-7.jpg
Views: 24
Size: 392.5 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24978d1501267962-header-install-my-99-cimg0018-7.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
And here are some interesting pictures.
![Name: CIMG0019-7.jpg
Views: 30
Size: 212.4 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24979d1501267962-header-install-my-99-cimg0019-7.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0020-8.jpg
Views: 32
Size: 178.0 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24980d1501267962-header-install-my-99-cimg0020-8.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0021-6.jpg
Views: 30
Size: 227.5 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24981d1501267962-header-install-my-99-cimg0021-6.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0022-8.jpg
Views: 21
Size: 148.6 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24982d1501267962-header-install-my-99-cimg0022-8.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
Here'* another friend of mine. I bought him a chocolate malt ice cream thing so that he would help me break out some of the bolts for the rear head.
![Name: CIMG0023-7.jpg
Views: 29
Size: 194.9 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24983d1501267962-header-install-my-99-cimg0023-7.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0024-10.jpg
Views: 27
Size: 226.0 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24984d1501267962-header-install-my-99-cimg0024-10.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![](https://i897.photobucket.com/albums/ac171/rjordanovic/CIMG0025-7.jpg)
![Name: CIMG0026-9.jpg
Views: 26
Size: 168.7 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24985d1501267962-header-install-my-99-cimg0026-9.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
![Name: CIMG0027-8.jpg
Views: 26
Size: 166.1 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24986d1501267962-header-install-my-99-cimg0027-8.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
Yes, I didn't finish it, but it was a fun day nonetheless. Here'* a sneak peek of the header install:
![Name: CIMG0028-7.jpg
Views: 27
Size: 165.4 KB](https://www.gmforum.com/attachments/your-ride-gm-pictures-videos-89/24987d1501267962-header-install-my-99-cimg0028-7.jpg?*=91d9b08613357d21bf36a9b4129ab0dd)
#6
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I actually haven't been able to finish because neither trans dipstick that I have, W-body or H-body, fits. It looks like I'll try another W-body dipstick and shove it slightly differently, but overall it doesn't seem like I will finish until late tomorrow. If someone has a picture of a W-body dipstick, please let me know.
#10
DINOSAURUS BOOSTUS
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Was on the phone with Rad a bit last night. He'* not having much luck getting the tube in the right place. I did a TOG install recently and it took a bit of working over the tube.
I don't understand why they can't all install like SLP'*. The couple I've installed went quick, nice and easy w/o any fitment issues to the tube. Being an installer...I'm biased.
I don't understand why they can't all install like SLP'*. The couple I've installed went quick, nice and easy w/o any fitment issues to the tube. Being an installer...I'm biased.