I have an SLP Loudmouth 1 for sale if you are interested. It's a muffler delete. $275 pickup in Aurora

I have an LS3 and LOVE the muffler delete. I wasted $450 on an Axelback. Sold for $200 and had a quality mandrel bent pipes welded in. GO FOR IT. Don't waste your money on an axelback. Since you have an automatic, you should get a dyno and they can adjust for that.

what the hell is AFM ?

Active Fuel Management.. Basically, Displacement on Demand..

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TVS2300 @ 9PSI, DougThorley LT Headers w/ Magnaflow HF Cats, Borla Touring, Cold Air Inductions CAI, RX Catchcan
Pedders Track-II Suspension w/ Xa Coilovers || PFADT Sways, Trailing Arms, Solid Cradle Mounts
Hendrix Engineering L5 Axles, DBA4000 Rotors, Carbotech XP10/XP8, Motul RBF600, GTO clutch reservoir
Heritage Grille, MPD-1 Spoiler

With the auto V8, under low-load conditions, I think four cylinders shut down.

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STRAIGHT OUT OF THE OWNERS MANUAL:

Active Fuel Management®
Vehicles with V8 engines and an automatic transmission have Active Fuel Management®. This system allows the engine to operate on either all or half of its cylinders, depending on the driving conditions.
When less power is required, such as cruising at a constant vehicle speed, the system will operate in the half cylinder mode, allowing the vehicle to achieve better fuel economy. When greater power demands are required, such as accelerating from a stop, passing, or merging onto a freeway, the system will maintain full-cylinder operation.

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"Many things in life will catch your eye, these are mods...... purchase at will."

THANKS! KidKilowatt!

Hello, my name is Bubbles and i am a mod-addict, and i drive a cashmaro.

Exactly right, and the only thing I HATE about my Camaro! I've not done it, but with a tuner, you can turn the AFM off. (Don't want to start the debate over voiding engine warranty though. )

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2010 2SS/RS - CAI Intake, Borla Headers & Atak Cat Back Exhaust, Euro 33 Rims, Showstopper Goodies, 1.5" Belltech Lowering Springs