Those are beefy.. Post some vids of it running

 

that's the stock size, i asked them about 3" after the cats and they said 2.5 is better
for low end torque, i took their advice, they will make it 3" if you want.

 

With both sets side by side on the floor, which one would you recommend? I have an 08 Sierra Denali 6.2L and am leaning heavily towards the AR Headers.

 

The AR should be better for performance.

 

ARH tubes are slightly longer, spun cats should flow better and rear collector is better design for flow

 

lets hear what they sound like. i'm looking at getting the same set up

 

Now that you have had them installed for a few weeks, how do you like them? Any new rattles or leaks? What do you think of them compared to the Dynatech's you had on your last truck? Thanks

 

i like em. no issues except the sound they make running in 4cyl mode and when switching
from 8 to 4 or 4 to 8. i may disable dod, gas is almost affordable.
also got new codes, p1133 and 1153, which could be exhaust or tune related or could be
sulphur in the gas related, i posted in tuning section on that, i haven't had time to address it but when the light is on the truck doesn't seem to have the normal zip


if you look at the pics in the first post it is plain to me the arh's should flow better.
tubes are swept back with less angles and collectors are better design.
i still have a set for sale.....

 

Very nice headers man!
You had no issues with clearance anywhere correct?

 

full write up

https://www.performancetrucks.net/fo...d.php?t=430345