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Thread: Performance Exhaust?

  1. #1

    Default Performance Exhaust?

    Hello -

    I have a '97 D-90. Several years ago, I put larger pipes from the Catalytic converter back and a perfomance muffler on on the car. I am not sure if I got more horsepower. I think that exhaust sound increased a little. I was thinking about investing in an engine back system from NRP or BORLA. Has any one done this? Has it improved performance, MPG, anything else?

    Please advise.

    Thank you,


  2. #2
    Join Date
    Mar 2006
    twisties~Vermont tarmac rallye style


    Back when I owned my '94 Defender 90 NAS Soft Top I put a NRP exhaust on and was pleased with it. My D90 had 48k miles when the original rear muffler needed replacing. I ended up installing this right before the long drive from VT > CO 2001 Solihull Nationals. Yup, we drove with the pop-up trailer with BFG Mud Terrains and new NRP all the way out and back. The BFGs ended up being louder than I thought

    (Taken half way down Black Bear Pass trial looking back up, Telluride, CO would be to the extreme right.)

    The exhaust helped on Hwy 70 Vail Pass . Not sure if it made any huge mpg improvement (I was towing a pop-up camper) but man did it sure sound good on full throttle going up Vail Pass. Oh, I also had a K&N air filter installed and removed the air intake horn for increased air, even if it was hot.
    Last edited by TSR53; 08-07-2007 at 02:52 PM.
    Cheers, Thompson
    Art & Creative Director, Rovers Magazine
    Rovers North, Inc.

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