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  • High-flow cats

    Where's the best place to buy the most inexpensive hi-flow, direct bolt-on cats for a Z-34 Lumina?
    1989 Corvette L-98
    Rebuilt 700-R4 with 2200 RPM stall lock-up Torque Converter
    Hedman LT Headers
    Dynomax Exhaust
    Cross-Drilled and Slotted Rotors
    Accel Ignition
    Bilstein Shocks
    Line-Lock
    Edelbrock Valve Covers
    Smog Pump and Cats removed
    K&N Air Filter

    1993 Lumina Z-34
    83,000 Miles
    Stock, for now.

  • #2
    google.com for 2.5" high flow cat.
    Ben
    60DegreeV6.com
    WOT-Tech.com

    Comment


    • #3
      Direct bolt on high flow cats? That's going to be quite hard to find. Magnaflow/CarSound make some good high flow cats. A test pipe will make more power, but is not emissions legal.

      Tim
      1995 Z34 - T04E "60" trim, 42.5 lb/hr injectors, AEM WBO2, FFP UD&DB, 3" exhaust, 2800 stall, shift kit, tranny cooler, Powerslot, Hawk HPS, rear disc conversion, KYB, Eibach, HMS F&R STB, Fittipaldi Force 18" wheels, big stereo, lots more coming eventually...
      325 whp 350 lb-ft

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      • #4
        Originally posted by timg
        Direct bolt on high flow cats? That's going to be quite hard to find. Magnaflow/CarSound make some good high flow cats. A test pipe will make more power, but is not emissions legal.

        Tim
        Well, actually, the car just got inspected, and just barely passed emissions. Plus, the engine temp goes up the faster you go; highway speed. The stock cat is clogged. I was thinking of a hi-flow cat, but I also thought about getting rid of the cat altogether by putting a straight pipe there for now.
        1989 Corvette L-98
        Rebuilt 700-R4 with 2200 RPM stall lock-up Torque Converter
        Hedman LT Headers
        Dynomax Exhaust
        Cross-Drilled and Slotted Rotors
        Accel Ignition
        Bilstein Shocks
        Line-Lock
        Edelbrock Valve Covers
        Smog Pump and Cats removed
        K&N Air Filter

        1993 Lumina Z-34
        83,000 Miles
        Stock, for now.

        Comment


        • #5
          catco are cheap and flow pretty well. You'll likely have to weld or cut off and clamp it on.
          sigpic New 2010 project (click image)
          1994 3100 BERETTA. 200,000+ miles
          16.0 1/4 mile when stock. Now ???
          Original L82 Longblock
          with LA1, LX9, LX5 parts
          Manifold-back 2.5" SS Mandrel Exhaust. Hardware is SS too.

          Comment

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