So i finally got around to ordering and putting on my headers and i will say for the 4x4 guys you can go wrong... I have about 3/8-1/2 inch between the driveshaft and the Y-pipe.... I got the 6.2 versions for my 5.3 as they are the same size as the pacesetters. Room to grow... 1 3/4 primaries,3" collector and 3" y-pipe til the last 3" on the connection which goes to 3.5" to mate with the 6.2's factory exhaust which is easily fixable in many ways... The OBX's have two dummy cats which look like cats and the o2 sensors screw on opposite ends to make it look real, but really they are small resonators. It has a no rasp sound on my dumped exhaust with a borla bullet.. I will get pics and a video up here in the next day or so for you guys... $540 shipped off of ebay NNBS by the way

 

3 months ago i install the same headers on my 07 denali .no prob with them .

 

wow, sounds like they were built as advertized,
get us some pics.
that thing has got to be loud, can you do a video?
do you know if there is anything inside the resonators or are they just a shell

 

Yes sir ill get a vid as soon as the rain slows a bit today or tommorow..
Heres the few pics i got while installing..


After first heat cycle


The only thing is that they have 6 o2 sensor bungs so you will need 2 plugs standing by to plug them unless you have 2 wideband sensors to monitor both banks.

This is the truck they are on,it gets reg mudding and abuse sessions so they will be put thru their paces.


The only issue i ran into was the sparkplug wire boot on the second wire back on the front on driverside is way to close for comfort for me so a little wrap would be your safest bet...

The lil resonators arent hollow they look just like a mini bullet muffler inside. All the little perforated holes etc.

 

who was the guy u got them from...i need a set!

 

thats weird that they come with 6 02 bungs

 

my old OBXs came with 6 as well...nice for putting in widebands and such...

Truck looks awesome, I wouldnt hesitate to buy OBXs...awesome headers. Maybe I should get some for the 09

 

I probably will be going to OBX route too due to my limited income.

 

do they have more of them for that price??

 

I wonder if these would work on a nbs? I hate my old style obx just because that damn hoop thing on the drivers side...