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  1. M

    Will high flow cats quiet my car down?

    Currently have O/R Mac prochamber and Mac catback. I really want to quiet the car down some. I'm thinking of ordering two Magnaflow obdII compliant cats and having them welded in to the prochamber. My question is: How much quieter will this make my exhaust? If it's barely going to make any...
  2. M

    SCT XCAL Brenspeed...thoughts?

    I'm close to going forward with shelling out $379 for the "mail order" brenspeed tune. I Just wanna hear some thoughts from people who have done this as far as the power and performance gains you experienced from this. ive raed some people say they don't do much and that a dyno tune is the only...
  3. M

    Prochamber Install..help me here please

    Ok I've got a used prochamber. I did buy new nuts and bolts to replace the old ones, but didn't buy any new studs for the stock "header" where it meets the prochamber. I've already determined it would be a b**** to get those off. I will buy new nuts though. Is it really THAT hard to work the...
  4. M

    HP gain from MRT catted h-pipe?

    I have a Mac ss catback and jlt rai on my car. The catback I did not notice or expect a hp gain. The RAI I actually did notice some more pull on the top end. How much of a gain can I expect from a MRT catted h-pipe? The stock midpipe with those cats seems to be one of the more restrictive...
  5. M

    Advice please on this midpipe

    I currently have a MAC SS catback and am very pleased with it. I'm considering the MAC O/R prochamber. Wanted to stay away from the raspy sound that the X pipes supposedly produce. Would this be a good combo? Also..with my catback I didn't necessarily see or expect any much in the SOTP power...
  6. M

    Weld in high flo Cats?

    Does anyone do this? I have a Mac SS catback and wanting to upgrade the midpipe. I do not want to go O/R. Are the cats themselves the most restrictive part of the stock midpipe? If so, is there a high flowing universal cat on the market that can replace the factory cats with a weld in? Will...
  7. M

    MAC SS Catback $429

    good deal? ive read people had some issues with MAC quality and fitment, but this is full SS so should hold up pretty well, wouldn't you think? Anyone had any fitment issues with the SS MAC catback? 429 free shipping seems pretty dang reasonable.
  8. M

    FR 4.6 PI Heads

    I got into reading about the whole blowing spark plugs and people helicoiling the heads and such. No I haven't blown a plug, just curious and got to looking at what the cost would be to just replace the heads altogether. Jegs has the 4.6 PI Heads and install kit that totals to $486 per side. My...
  9. M

    Do Flowmasters hurt performance?

    The previosu owner of my car had some aftermarket mufflers welded in. Everything is stock I'm sure. I would think these are probably flowmaster mufflers. They do sound really good, but if I get the RPMs up to 3 or so and cruise to a stop...a lot of popping from the exhaust. Is this an...
  10. M

    Exhaust gurus help me out

    ok basically on an 00GT you're looking at 3 major sections of the exhaust..headers, midpipe (xpipe), and catback. Is this correct? I don't want longtubes for certain reasons and from what I hear shorttubes really aren't even worth the time and effort. If I go with a catback alone and maybe...
  11. M

    Throttle Body and Plenum..worth it??

    Trick Flow plenum and say a BBK 75mm throttle body...what will these two do for me on an otherwise stock 00GT??
  12. M

    Hydroboost replacement

    Had some on and off PS fluid leakage and noticed the hydroboost had some leakage. broke down and just bought a new hydroboost to take care of it. installed it yesterday. Had to reuse a couple things from the old part, one of which is the little black box on the driver side of the booster that...
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