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Did a install on a set of LT headers that I ordered from LPP today on my 2011 Silverado 5.3.

I want to start by saying that it was great dealing and communicating with Carl. Shipping time was very prompt and everything came packaged very well. Quality of the headers look great, nice clean welds, clean bends, and everything fit together pretty much perfectly. I'm by no means a mechanic, never had a job working on motors so I'd say my experience level at novice. The headers were very smooth to put on. Really the "hardest" part of the whole thing was cutting out all of the old exhaust.

I re-used the same head bolts that I took off the factory headers, all came out very easily as I soaked them in PB Blaster the night before and morning of install. Gaskets were fine from the stock headers but I used the ones I recieved from LPP as they were metal. Both drivers side and passenger side slid up from the ground easily and bolted right in no problem. Great fit, no rubbing anywhere or extra fab needed. Clears steering shaft, spark plugs, frame, and o2 sensors were able to be screwed back in to the threaded ports. Y-pipe bolted on nice and was easily connected to flexible mesh part just above my muffler. Install time took me 4 hours.

They sound great and perform great! Very very pleased with everything I have.
 

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awesome, sounds great man. I really would like some headers on mine. What did it do with cats? Does it still use any? If not, how do you clear the engine code?
 

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Sounds perfect! I ordered a set of TSP longtubes and O/R y-pipe months ago and they've still never come in...the y-pipe has been on backorder and I refuse to go with Pacesetter...did you drop your transmission crossmember to rip out your stock exhaust and put these in? I recently ran pipes out behind my passenger rear tire because my wife hated the turndowns so I could only imagine how it would be with an off road y...would love to hear some drive by and interior clips!
 

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awesome, sounds great man. I really would like some headers on mine. What did it do with cats? Does it still use any? If not, how do you clear the engine code?
It does not come with cats. I didnt want to run cats anyways so Im glad they didnt. Y pipe it comes with flanges directly onto headers straight to the stock flex piece. I scrapped all my old cats and exhaust parts that I cut out and pulled. You'll most likely throw an engine code since the truck is detecting there are no cats, but a simple tune will erase those. I gotta go back to my tune guy that runs the EFI Live on my truck to have him tweek it a little.
 

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Discussion Starter #6
Sounds perfect! I ordered a set of TSP longtubes and O/R y-pipe months ago and they've still never come in...the y-pipe has been on backorder and I refuse to go with Pacesetter...did you drop your transmission crossmember to rip out your stock exhaust and put these in? I recently ran pipes out behind my passenger rear tire because my wife hated the turndowns so I could only imagine how it would be with an off road y...would love to hear some drive by and interior clips!
I didnt take out the cross member as theres really no need to. Thats just more work thats unnecessary to do. I used a torch and cut 2 sections of the stock pipes out and removed them.
 

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Ive been considering this because my truck needs more lower end. BUT, I just moved to California and am yet to have my truck smog tested. Its still registered and plated in Michigan so I need to find out how long I can do that. Truck is in my moms and my name as I couldn't get approved a loan by myself. If I do get longtubes id like to keep my stock manifolds and Y pipe so if I do have to have it smogged I can swap everything over in a few hours. whatd be the easier route?
 

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Ive been considering this because my truck needs more lower end. BUT, I just moved to California and am yet to have my truck smog tested. Its still registered and plated in Michigan so I need to find out how long I can do that. Truck is in my moms and my name as I couldn't get approved a loan by myself. If I do get longtubes id like to keep my stock manifolds and Y pipe so if I do have to have it smogged I can swap everything over in a few hours. whatd be the easier route?
first..
you have 30 days to get a CA drivers license, and vehicle registered after you move here.. per. CA. motor vehicle code.

second..
LT's are not legal here. the CHP do run spot checks for emission compliance. under the missing-modified-disconnected emission clause in motor vehicle code, and penal code..fines are very high, and the cost to replace everything, and having to be retested by a state shop. IMO not worth the hassle..

just get a good tune
 

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cuz CA sucks that way
 

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Discussion Starter #15
That's them. I would recomend purchasing these. I don't like the clamps that come with them though, I ended up using welds as my bonds.
 
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