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Thread: cats or no cats

  1. #1
    Join Date
    Jan 2009
    Location
    Rhode Island
    Posts
    241

    cats or no cats

    my truck has true duals with glasspacks should i take the cats off, if i do will i burn out rings from not haveing alot of back pressure
    06 GMC 2500HD EC/SB 6.6 LBZ allison 6 speed, 4" MPRP turbo back, QS2 on the 70HP tune
    2000 chevy2500 RCLB 6.0
    4L80E,4.10s,aem intake,180 t stat,ported tb,descreened maf, true duals with high flow cats and 40s dumped, lt285/75r16 MTs,an a hypertech programer for now saving for a custom tune now its dead
    15.9 at 88 with mudd tires
    1973 chevy k10
    1989 chevy k1500 stepside

  2. #2
    Join Date
    Jun 2008
    Location
    Houston
    Posts
    2,348
    why do u want to take them out? to be louder?
    74 Austin Morris Mini 1000 - Daily Coil Spring conversion, lowered, Disc Brake conversion
    FOR SALE: 04 RC/LB Duramax -12 second tow pig, built Allison, Tune, and supporting mods
    FOR SALE: 03 Silverado SS -DBRods built 40X, DP, Suspension. Going for fast

  3. #3
    Join Date
    Mar 2003
    Location
    San Marcos Texas
    Posts
    4,393
    Take them out you won't miss them!
    2006 Superior Blue Trailblazer SS AWD, Stock as a rock

    Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).

    Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning

  4. #4
    Join Date
    Jan 2009
    Location
    Rhode Island
    Posts
    241
    one is creaked so i figured id take them off
    06 GMC 2500HD EC/SB 6.6 LBZ allison 6 speed, 4" MPRP turbo back, QS2 on the 70HP tune
    2000 chevy2500 RCLB 6.0
    4L80E,4.10s,aem intake,180 t stat,ported tb,descreened maf, true duals with high flow cats and 40s dumped, lt285/75r16 MTs,an a hypertech programer for now saving for a custom tune now its dead
    15.9 at 88 with mudd tires
    1973 chevy k10
    1989 chevy k1500 stepside

  5. #5
    Join Date
    Feb 2007
    Location
    College Station, TX
    Posts
    2,193
    6.0s sounds crappy with no cats and glasspacks IMO. Guy here at work has the same setup. Id change Mufflers if you do take the cats off. Go magnaflow
    2012 F-250 XLT/FX4 RCLB 6.7 Powerstroke
    H&S XRT Pro Race(550hp/1100tq)/ 4" flopro exhaust/H&S EGT kit/SPE Full diff unlock/S&B CAI/H&S motorsports upcharge pipe kit/ DPF,CAT,EGR,UREA Deleted/Icon 3.5" Lift-Vs 2.0 shocks/PMF DSS w' Bilstein 5100s/Icon Adj Track Bar-upgraded steel bearing/RIGID LEDs/Kenwood DNX570HD w/idatalink maestro/Hertz5x7s/Memphis 12" slim/500.1 JL slash amp/Recon f250 led emblems

  6. #6
    Join Date
    Jan 2009
    Location
    Rhode Island
    Posts
    241
    ho about super44s and no cats is it a good idea also who makes a good aftermarket cat
    06 GMC 2500HD EC/SB 6.6 LBZ allison 6 speed, 4" MPRP turbo back, QS2 on the 70HP tune
    2000 chevy2500 RCLB 6.0
    4L80E,4.10s,aem intake,180 t stat,ported tb,descreened maf, true duals with high flow cats and 40s dumped, lt285/75r16 MTs,an a hypertech programer for now saving for a custom tune now its dead
    15.9 at 88 with mudd tires
    1973 chevy k10
    1989 chevy k1500 stepside

  7. #7
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,078
    I don't like the stink without cats but I'm also a whiner. If mine was fast I'd hack them off and live with it I guess...

  8. #8
    Join Date
    Apr 2008
    Location
    Okeechobee, Fl
    Posts
    2,007
    If you leave the glasspacks in w/o cats it will sound like crap!! Put some Magnaflows in and it will sound 100x better!
    2006 extended cab, 6.0 swap, full bolt ons SOLD
    2011 ECSB, 6.2, 6 spd, 3.73, 5" lift, 33" nitto, limo tint, debadged, volant CAI, muffler delete, black bear tune 14.0 @ 98 on the 33'sSOLD
    2007 TBSS AWD, cam, stall, built trans, N2OSOLD
    2006 RCSB cammed LQ9, full exhaust, 3200 stall, 2-4 drop
    Quote Originally Posted by farmtruc View Post
    "if i have to explain, you don't get it"

    49 Ford F1
    355 chevy / turbo 350 / 12 bolt posi / camaro subframed

  9. #9
    Join Date
    Jan 2009
    Location
    Rhode Island
    Posts
    241
    how about hi flow cats and glasspacks cause the exhast is less then a year old only reason on cat creaked was cause it was bashed offroading so now i got a horribl exhat leak thats driving me up a wall
    06 GMC 2500HD EC/SB 6.6 LBZ allison 6 speed, 4" MPRP turbo back, QS2 on the 70HP tune
    2000 chevy2500 RCLB 6.0
    4L80E,4.10s,aem intake,180 t stat,ported tb,descreened maf, true duals with high flow cats and 40s dumped, lt285/75r16 MTs,an a hypertech programer for now saving for a custom tune now its dead
    15.9 at 88 with mudd tires
    1973 chevy k10
    1989 chevy k1500 stepside

  10. #10
    Join Date
    Jun 2008
    Location
    Houston
    Posts
    2,348
    just sell that whole system and get long tubes with off road y and the magnaflows cus they sound good. im about to try out pace setter long tubes with off road y and a borla muffler hoping for a good sound we will see
    74 Austin Morris Mini 1000 - Daily Coil Spring conversion, lowered, Disc Brake conversion
    FOR SALE: 04 RC/LB Duramax -12 second tow pig, built Allison, Tune, and supporting mods
    FOR SALE: 03 Silverado SS -DBRods built 40X, DP, Suspension. Going for fast

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