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Pontiac Bonneville Owners: Accessories & Modifications

Karen@EdmundsKaren@Edmunds Posts: 5,024
edited April 5 in Pontiac
What modifications have you done to your Bonneville? And accessories? Please share!

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Karen-Edmunds Community Manager



  • smfransmfran Posts: 432
    All I've done is add the K+N air filter and added a pin stripe. The car is powerful enough for me and I don't want to spend any more money!
  • refinerrefiner Posts: 59
    So far 180 degree thermostat, 3.5 pulley, Thrasher CAI, a pair of Vortex high flow mufflers, Saner rear sway bar and end links, Super Plasma head light bulbs, close as I could get to HID without spending $700.00.And composite throttle body spacer. I have on order stage 2 MAF and adjustable fuel pressure regulator from RAT.
  • snicklesnickle Posts: 147
    180 degree Thermo
    3.25" Pulley
    Flowmaster Mufflers
    Saner Rear bar and Endlinks
    Casper AFPR
    AutotransInterceptor Removed
    9" Cone-filter (Building CAI)
    Front sway bar on order.
    Shift Kit on order

    I think that is all :-)
  • 180 degree thermostat
    3.4" stout snout
    RAT stage 2 MAF sensor
    K&N air filter (drop in)
    Magnacore plug wires
    RAT adjustable fuel pressure regulator
    transmission cooler
    heat wrap on exhaust crossover
    window tinting
    painted brake calipers red
    painted SSEi emblems gloss black
    Sylvania cool blue headlights
    Plasmablue Xenon fog lamp bulbs

    I am waiting for someone to experiment with the SAE computer modifications, I want one but don't want to be the first to try it. Also am thinking about a shift kit.

    Thats all for now!
  • theicemantheiceman Posts: 736
    I've got tons of questions on your lighting: I'd love to go HID because illumination is very important to me (I consider it a key safety feature and, besides, the Xenon blue tint looks sharp!).... What made you go with the Sylvania cool blue and had you considered a HID conversion? or did you consider, like me, that the cost was just too prohibitive? I've heard that the PIAA plasma super white bulb is good (better be at $85 US/pr.) but I didn't see Sylvanias at the local mod shop - are they any good (in your opinion)?

  • The Sylvania Cool Blue's were the only ones I could find at the time. I just replaced my fog light bulbs with Plasmablue 893's. I got them cheap from E-Bay. I also got a pair for my wife's Toyota Solara Convertable and they look better than my Cool Blues. I think you can search E-bay for plasmablue and find the seller. He has a web site but gets 69.00 a pair on his site. I got mine for 12.00 a pair by auction.
  • kzmkzm Posts: 55
    To those whose aspirations are to mod their Bonnie to the max, here's a web site that will aid you (us)in that direction:

    they provide custom A-pillar gauge mounts just as long as they get 20 or more advance orders. The prices seem pretty reasonable. Although I'd like to know what extra gauges would go on those pillars.



  • kzmkzm Posts: 55
    A few of you may find this interesting:

    1992-93 Bonneville Performance Kit
    Bolt on 35+HP
    Easy installation
    Performance Tuned Upgrade
    Systemized Approach
    Series 2 Power Levels for Series 1 Motors.

    Add 35+hp with the RAT free-flowing cone filter air intake system, supercharger pulley and billet aluminum adjustable fuel pressure regulator
  • jperdochjperdoch Posts: 2
    These 2 things seem like the hot setup for some better performance with minimal mods.

    Do you know if K&N makes an airfilter for a 2001 ? Also, are the flowmaster mufflers bolt-on or do they require adapters ?

    Any warrenty implications here ?

  • smfransmfran Posts: 432
    I have the K+N for a 2000 SSEi. I don't see any reason why it would not be the same one for a 2001.
  • rb8225rb8225 Posts: 33

    Regarding the K&N filter, I had seen in a previous post that the part to use was a K&N E-0940. I checked one out at the local Autozone store. It's a cone shaped filter. Now, when I look at the filter in my car, I don't see any way to get the K&N in there. I thought that maybe the existing square filter housing would just be removed & a short adapter put between the hose & filter, but then I noticed a good sized bundle of wires going into the air filter box. So, It doesn't look like the box can be tampered with.

    How did you fit the K&N on your car? Is the E-0940 cone filter the one to use?

    Inputs from anyone who has done this are appreciated. Pictures would be a bonus. Thanks!
  • rb8225rb8225 Posts: 33
    Now that I think about it, the bundle of wires heading into the air intake box is probably for the PCM, located there for cooling. Is this true?
  • smfransmfran Posts: 432
    The part # is MM33-2086 and is an easy rectangular drop in replacement; no modifications necessary.
  • homer2000sseihomer2000ssei Posts: 159
    thats what i went with , the dropin rectangle filter. What a pain in the [non-permissible content removed] that is too - to do it comfortably - you are required to remove the rubber air flow hose so you can back the cover off the air box far enough. D'OH. Until you do that - say goodbye to skin on your knuckles.

    I also thought about the cone - but am interested in what to do with those wires in the box?
  • I have a 1992 SE, with a K&N E-0940 cone filter installed. That bundle of wires is the temperature sensor, I believe. I removed the whole airbox and took the sensor out and attached it so it is right outside the cone. The cone, BTW, connects right to the tube. The tube pops right into the cone (take out the little metal tightening thingymajig first though) and you have a K&N. I have noticed a tad more power, remember mine is the base 170hp SE so it doesn't do a whole lot of difference. But 50-80 pull (2nd gear) has really improved. This summer I am going to make a ram-air setup, and take the intake tube out of a GTP (where the sensor goes directly into the tube).
  • rb8225rb8225 Posts: 33

      Thanks for the correct part number. Now, I just need to find it around here. I may have to buy it online.

      Dennis- Your right about the enclosure being tight. When I was checking it out to see if the cone would fit, I wondered how to even get the drop-in filter in there without messing it up.

      It's too bad Thrasher doesn't make a unit for the Bonneville like they do for the GTP. I wonder how close the GTP version would be to fitting into the Bonneville?

  • shinysseishinyssei Posts: 1
    I have a Jacobs coil pack with their plug wires and a K&N filter. I paid about $270 for the whole package from them .

    My K&N is the rectangular drop in. I thought about the cone, but was afraid of degrading performance in summer from sucking hot engine compartment air.

    Please let me know how the GTP intake mod goes.

    Also, where do you get the pulleys for the supercharger?

  • rb8225rb8225 Posts: 33

       Thrasher also has a modified pulley and remover/installer tool. You can see it here:

      There is also a Magnuson Nose Drive kit; you can find it here: and they offer a choice of pulley sizes. Personally, I would love to do the pulley mod but am afraid of the warranty issues right now.
  • kzmkzm Posts: 55
    Here are my major Mods so far:

    My K&N Drop in filter:


    And my Jet PCM:


  • rb8225rb8225 Posts: 33
    I was thinking about the recent messages about changing pulley sizes, & I started to wonder how GM came up with the size of pulley (3.8 inch?) used on the stock supercharged engine. Probably the best mix of power, fuel economy and emissions, but I wonder what the deciding factor was. Anyone have any idea of the rational for that particular choice?
    Also, what are the downside effects of changing to a smaller pulley? Other than possible warranty issues? Does the gas mileage get real bad? Can't keep the car under the speed limit & the tickets start piling up? Failed the emissions test?
This discussion has been closed.