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  1. #1

    Question QUIET Cat Back System recommendations please.

    Looking for some opinions on cat back exhaust systems for my 2007 Sierra 1500 with 4.8L, I want to keep the exhaust as close to stock sound as possible but be able to gain a bit of power to help my CAI and canned tune come to life. Right now I actually like the power the 4.8L is making with just the CAI and the Diablo 87 octane with hard shifts tune installed, the truck accelerates hard and doesn't attract attention doing it so I want to keep the truck quiet but fast, sleeper.

    Any help will be greatly appreciated and thanks in advance.
    * My post are intended for entertainment purposes only and should not be taken serious unless I'm posting in the Buy/Sell section of this board and all opinions are that of mine ONLY.

  2. #2


    A flowmaster 70 series will give you the stock sound level but you will compromise performance because flowmaster doesn't have the best flow...

  3. #3

    Enkeiavalanche's Avatar
    Join Date
    Apr 2010
    Piermont,NY, back in Northern NJ now, But may be in IL soon....


    Corsa Touring system.. You will be happy...
    08 Z71 Avalanche Mods to date: K&N CAI,Hellwig Swaybars and End Links, Corsa Sport Exhaust, Superchips Programer,IPCW LOF & 3rd brake light and tails, AMI Gas door,Show Hooks and Door locks, Enkei Wheels, with Pirelli tires, StreetScene Bowties, Grant Steering wheel,Muth signal mirrors,SSBC Big Brake kit,Huskyliner Mug gards,Floor mats and Hood shield, McGard Lug nuts and locks, Bedrug, Cervini's Ram Air hood,35watt HID Fog lights, Sylvania bulbs all around ZXE's Highs and Lows, WhiteNight Back up lights,Sirius and HD Radio, SnugTop sitting on deck now Got a Softopper on now,Tempress Boat Hatches.... New Bilstein shocks are on... New Mods coming soon..... X

  4. #4


    The corsa is awesome! But, MAY be louder than what you are looking for. I suggest that you go to youtube and search Chevy 4.8L with corsa touring, then do with corsa sport, flowmaster, etc... This might give you an idea of what each sound like. I think that the corsa touring would be one of the quietest, spendy, but nice!

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors,
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

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