LLY: 2005 different stock air filters

[mechman3]

Anyone know which of these 2005 stock air filters are different?
The square filter is from a 2005 GMC 3500
The round filter is from a 2005 Silervado 2500HD
Both are LLY's
Which is the better stock set-up?

 

[GSXRTURBO1]

someone correct me if I'm wrong, but I believe the round style has more filter area and is superior. I'm only going by what I remember to have read, so please don't take what I say as gospel.

 

[THEFERMANATOR]

The round filter is actually used from 06+, but GM offerred it as an upgrade for 04-05 LLY's that would overheat so there are quite a few 04-05 LLY trucks with them running around. The round filter flows FAR superior to the square flat panel air filter that the 04-05 trucks came with from the factory, but requires a tune flash to use as it uses a larger diameter tube to the mouthpiece. You also need the turbo mouthpiece from the truck with a round filter to run it as the connection of the mouthpiece is different between the two.

 

[02greysixer]

Round is the later one. Lbz/lmm style. It does flow better

Sent from my SAMSUNG-SM-G870A using Tapatalk

 

[mechman3]

I havew both trucks but I am selling the round filter truck. However if that is a better system I will switch the air-box and filter set-up.

 

[mechman3]

So I would need to swap set-ups from fender to turbo correct?

 

[JoshH]

You will also need to retune both trucks for the filter change.

 

[THEFERMANATOR]

You will also need to retune both trucks for the filter change.

What he said. The rpund filter is FAR better than the square one, but the round filter I believe uses a 5" tube where the MAF goes, and the square one uses a 4" tube. So the ECm has to be flashed for the change or else it will pop MAF codes.

 

[mechman3]

OK so the switch is complete. I did this after replacing headgaskets, installing arp's, a MRBP 3" downpipe, egr block plate and installed the LBZ mouthpiece. The truck runs like a dog. no throttle response. I put on, temporarily, an edge only to see boost. The truck feels like it is not making power and/or the turbo is not lighting. In stock tune terrible, in drive tune lvl 3 it runs much better but not super. Is this because the truck needs to be flash tuned? or am I missing something else? Only code is for egr. On a side not I did also swap MAF sensors. So the MAF that was in the truck is still in the truck.

So I need to update my sig to read 2005 GMC 3500 LLY egr block,ARP Studs, 3" MBRP downpipe LBZ mouthpiece and for the moment Edge Chipw/Attitude otherwise stock for the moment

 

[JoshH]

OK so the switch is complete. I did this after replacing headgaskets, installing arp's, a MRBP 3" downpipe, egr block plate and installed the LBZ mouthpiece. The truck runs like a dog. no throttle response. I put on, temporarily, an edge only to see boost. The truck feels like it is not making power and/or the turbo is not lighting. In stock tune terrible, in drive tune lvl 3 it runs much better but not super. Is this because the truck needs to be flash tuned? or am I missing something else? Only code is for egr. On a side not I did also swap MAF sensors. So the MAF that was in the truck is still in the truck.

So I need to update my sig to read 2005 GMC 3500 LLY egr block,ARP Studs, 3" MBRP downpipe LBZ mouthpiece and for the moment Edge Chipw/Attitude otherwise stock for the moment

You will also need to retune both trucks for the filter change.

.....

 

[mechman3]

Thanks Josh. Is this something that needs to be done at the dealer?

 

[cstephens93]

The dealer should be able to flash it. They might charge you though.

Or you could get a tune from one of the vendors on here via EFI Live and have the MAF scaled for the tube.

What are you doing with your old setup?

 

[mechman3]

The old set up is going on the old truck. The old truck is being sold. BTW from the looks of your signature I am going to be very close to your set up with the exception of a 4" exhaust. The exhaust will not be straight though.

 

[cstephens93]

The old set up is going on the old truck. The old truck is being sold. BTW from the looks of your signature I am going to be very close to your set up with the exception of a 4" exhaust. The exhaust will not be straight though.

I wish I would have went with the 4 inch exhaust. My 5 inch is not the tone I'm looking for.

 

[JoshH]

I wish I would have went with the 4 inch exhaust. My 5 inch is not the tone I'm looking for.

Put a muffler on it.

 

[cstephens93]

Put a muffler on it.

Thought about it.

But Ive always been under the impression that the 4inch vs 5 inch is what makes the bigger difference. I want the raspy tone vs the rumble tone.

I'll look into a muffler though

 

[JoshH]

You're going to have to get a 4" then. The 5" will always have a deeper tone.

 

[cstephens93]

You're going to have to get a 4" then. The 5" will always have a deeper tone.

Yup I figured. Its not that important to me yet to go out and buy one.

Thanks!