What did you do to your OBS GMT400 Tahoe/Yukon Today?

[95escahoe]

Lol, sorry, I've been looking, but no one ever seems to put those on these trucks. Not that I've seen. They all do shorties or long tubes.

What's your opinion on them? How did they fit? Looks like they have no problems with spark plugs or wires?

X2 been debating them for mine

Sent from my HTC One X using Tapatalk 2

 

[SunlitComet]

The headers sound good!

Work at SFO, do ya? I think I spotted the Oakland Bay Bridge in the background of one of the vids. Good lookin' aircraft you caught on film there!

Yes, just goofing around with my new Galaxy S4 until I can get my hands on a Canon 7D.

---------- Post added at 09:05 AM ---------- Previous post was at 08:44 AM ----------

Lol, sorry, I've been looking, but no one ever seems to put those on these trucks. Not that I've seen. They all do shorties or long tubes.

What's your opinion on them? How did they fit? Looks like they have no problems with spark plugs or wires?

Well these are the best ones you can get that are street legal in Cali. I obviously love them for power and the looks of all that extra piping. I think getting the headers in with new individual cats on the existing rear flange that was reused was most difficult for the shop. They normally don't do header installs because it is time consuming. He normally just sticks with cats and further back. If you look at my engine bay pics I think my setup was a bit over his head. The oil level tube had to be bent a bit to keep it off the header and well as the bolt assembly had to be changed for it to mount on the head as the header flange caused a minor obstruction.. But after 8 hrs and 2-3 guys working here and there it was finally done. I think it was really getting the old manifolds out and new ones in that was time consuming. They had to make a homemade stool step that hangs over the tire because he is not tall, the vehicle was on a drive-on ramp lift and my torsion bars were cranked. Including the prices a paid at the time of getting various parts in the last year, my total cost of parts and labor came in just under $1500 for the entire exhaust system. It is likely it should have been about $500 more. Outside of Cali the total would have been about $300 less.

Summit still says they can sell the headers but you will have to verify whether they can get them and for the driveline you have. I called doug thorley directly once about a group buy for here and they said they needed a 30 set commitment in order to break out the jigs and build them. I could not get enough of you guys here to commit to $700 all at the same time.

Now we will see how the engine gaseous emissions work this next few days. I am tired of seeing a converter code everyday.

 

[Gzes]

Locked keys in hoe, got ripped off, put gas in the hoe

 

[KPOD]

http://s1222.photobucket.com/user/Sunlitcomet/library/?sort=3&page=1
Here you will find some pics and a video of open tri-y's before the rest of system is hooked up. That marks the completion of the exhaust system, head to tip, with new sensors. Also installed new MAF and MAP because they were given off skewed reading. First 20 minutes of driving was promising and showed fuel trim better then before so I will see how it goes on the next 720 miles of commute this week.

Is that on a 350 or 383? What does the rest of your exhaust system consist of? Any video of the final product?

 

[SunlitComet]

The original factory build lower block with new GM heads a few years ago. Only changed the rockers internally. Every other mod is external to the engine for now. Has about 253k on it. No sure when I will have the $5500 to put in the HT383E.

Doug Thorley tri-y headers, individual Cali grade hi flow cats and a flowmaster cat-back. And delphi O2's.

I will try to get a video or two of the exhaust notes but I need to find someone to help me record it on my tablet while I drive it a bit.

 

[SunlitComet]

You know after driving it to work this morning I noticed that my induction noise went down quite a bit as well as the exhaust pulsing is not pounding hard every revolution. More like many small pulses. The tri-y design really does make a difference in the sound. I think overall it is quieter then before. Also less shifting in cruise on the hilly freeways I go on. More like just stays in 4th with the tc lockup or not.

 

[rabbiporkchop]

I finished working the bugs out of my LM7 swap a few days ago. It runs like a 2013 model now.

 

[Monstar_est87]

Wish I could see those pix of that LM7 swap... All I see is [?]...
Just swapped out the front brake pads for some Hawk HD pads recommend by Sunlit... I am very pleased with these bad boys... I also took off my grill and cleaned up the front with degreaser and dawn soap and water then painted everything black... Looks great..! No more rusty oxidized parts behind the grill...

 

[DaRosa218]

Well, first let me start off by saying.... Looks whose back! Picked up a 1993 Suburban for my Pops and looking at a 99 Tahoe this weekend for myself. Cant wait to ditch my WRX and be back in a Tahoe

Here is a pic of my Pops Suburban by my WRX at a local car event

 

[Gzes]

Nice welcome back knew you werent gone. Shoulda picked up the 2dr tho.. you getting another 2dr?