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  1. #1

    Default Magnaflow Race Muffler's or performance mufflers for best performance or power?

    i just wanna ask if the race muffler's would give me more HP and Torque compared to the Maganaflow dual performance exhaust? Also would it be better to have 2 race muffler's 1 one each exhaust pipe compared 2 one considering i have a true dual exhaust and a magnaflow x pipe?

    2008 Chevy Silverado Ext. Cab Lt Z71 5.3 V8
    7.5 Inch Rough Country Suspension Lift
    RBP Replica Grille Black w Chrome Rivets
    Recon Smoked Cab Roof Lights
    N-Fab Powdercoated Gloss black Cab Length Nerf Steps
    5% Tint over 20% all the way around / 5% Eyebrow Strip
    AVS Smoked Window Visors
    Z71 Stickers Black & Metallic Silver
    Tow Mirrors / Smoked Turn Signals
    XM Satellite Radio Fin / Color Matched
    Interior Plastic Pieces / Color Matched
    Power Acoustic Tweeters
    Painted Bowties / Color Matched
    Painted Door Handles / Color Matched
    Smittybilt Bull Bar / Color Matched
    Custom Rolled Edge Exhaust Tips / Color Matched
    Custom 2.5 Inch Cat Back True Dual Exhaust
    Flowmaster Super 40 Series Dual in / Dual out
    Magnaflow Tru-X Pipe
    K&N Air Filter
    18x9 Rockstars Machined Black
    Center Caps / Color Matched
    33.13.50 Nitto Terra Grapplers
    New Front Wheel Well Liners
    Eagle Eye Black L.E.D. Tailights
    Eagle Eye Black L.E.D. Third Brake Light / Smoked
    Eagle Eye Black L.E.D. Halo Projector Headlights
    Notto HID Kit 10,000k Low beams
    Recon L.E.D. Light Bar
    Buschwacker OE Style Tailgate Cap
    AMI Gloss Black Antenna
    Debadged Chrome Lettering
    Door Molding Removed

  2. #2


    My opinion I would go with the racing xl dual in dual out I think you will loose power going with tru duals you have to have a lil backpressure if you dont have some backpressure you will loose power with your bottom end.
    08 silverado
    K&N cai
    single in dual out cherry bomb pro
    leveling kit
    custom painted bow ties
    Bed liner
    Tinted windows
    20inch Cruser Alloy Switchblades
    Goodyear Eagle GT2 285/50/20
    1 truly heavy foot + Wait4meperformance SCT Handheld
    100 shot of Nitrous Dyno tune system
    SS front bumper
    Matching painted front grill and bow ties

  3. #3


    Yeah would i'm guessing power wise i could just but a magnaflow and have more power and torque than my flowmaster because the magnaflow flows straight thru causing the gas air ratio to move much faster making performance and power better.

  4. #4


    the race muffler's are more designed for special applications...

    if your looking to go true dual's on your truck, then I would just stick with a DI/DO Magnaflow ( X-core ) muffler. You get a 2 for 1 combo...
    * 2008 Silverado 5.3L Z71 4x4 *
    15% Tint
    KMC XD Series Addict 17x9's
    Wrangler AT-S 265/70/17's
    K&N Intake - 63 Series
    Flowmaster Super 10 SI/DO Exhaust

  5. #5


    Yeah i mean basically i'm just askin since i got true dual exhaust with 2.5 inch pipe ran from manifold's back but i just installed a magnaflow x pipe to give me back pressure and more hp and torque along with it and even the flow.I also installed a flowmaster 40 series muffler true dual and it helped even more run's way better than stock! I was mainly wanting to know would a magnaflow give me more air flow and add a few hp and torque also?

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