Frequently asked questions and answers:

Q: Do you ship internationally?  A: Yes.  Just add items to the cart and enter your country/address. shipping charges will automatically calculate. if for any reason shipping does not calculate correct, please email and I will do my best to get you an accurate quote. 

Q: I've got a (insert obscure vehicle here) and would like you to make a (wing/lip/trim/thing)  A: Unless you are requesting a part that I already have plans to make, for a particular vehicle I already have access to, chances are you are in the 'special project' realm. some requests I can do, like "add brake duct holes" or "make it longer/shorter"...some projects require far more time and development. To accurately make a well designed and well fitting part, I need a prototyping model. (a clean, unmodified example that has not had extensive prior bodywork/repairs) It does not need to be YOUR car, but it does need to be the same year/model, delivered to me (in Santa Rosa Ca. , one hour drive north of SF) for a duration of a week or more, depending on scope of project. Expect a special project part to cost at least 2x + more than one of my 'Production' parts.

Q: How long will it take to get my part? A: Some more popular parts I have in stock and on the shelf, requiring only processing, packaging and shipping time (up to one week). I ship everything USPS priority, arriving to most of the US in two days, the east coast in three. If I do not have your part in stock, it will need to be made. From a flat sheet of aluminum, cut, shaped, fit and detailed...all by hand. This takes time. I try to "batch" orders together for efficiency and uniform quality control, so it may take up to 3 weeks before an adequate sized batch is ready to produce. If I foresee any production problems or delay beyond that, I will contact you directly within one week of receiving your order.  Please email me if you are on a deadline or request for an expedited order.

Q: Can I order part #xyz, but a little bit longer (wider/ more/less angle, etc)?  A: I try to design stuff for the majority of users, and offer some long/short versions of some parts. I am always up for requests, within reason and/or budget. Some parts cannot be custom made or modified without a car to fit them to. Expect additional cost at a real-time labor rate. Email me directly:

Q: Why aluminum and not steel? A: I started out making steel parts, and I like working with steel. It has great properties and attributes. However, the corrosion resistance of aluminum along with its lightweight nature make for a good motorsport application. After seeing a few of my parts destroyed in off-track (or loading on/off trailer) incidents, I have come to this conclusion: Aluminum, yielding to an impact and not transferring energy into the vehicle body (your expensive paintwork, valence, radiator support, etc.) is a far better outcome than a rigid part causing more damage to the steel body shell it is mounted to.

Q: I want to order two parts, can I combine shipping? A: I have tried to be realistic with the shipping so I get reimbursed for the cost of making custom packing crates. Most of the time two parts in one box requires making a custom and larger box (and costs more to ship due to size and weight)  If you order multiples of the same part, Please contact me via email and we can work on a discount code to get the shipping reduced.

Q: Do you sponsor race/drift teams?  A: Yes, we do. However, at this point in time I can only offer a small discount, as Kooglewerks is still just a small home-grown hand-made company.  discount is contingent on sponsorship contract and minimum purchase of three aero parts.

BMW 2002 Specific:

Q: I'm not sure which air dam to order, Long or Short? High or Low?  A: Much of the long vs. short debate is won by personal preference and "look" you are going for..(some have said the high mount only looks good on cars with no front bumper, etc.) Personally, I think anyone who is going to street drive an '02 with one of my air dam/chin spoilers is SAFEST with the shorter version...(with lowered suspension, you'll still want to avoid those nasty "parking blocks"....but the lip will still be higher than the lowest part of the frame.) that said, I also really like the lower mounted option (for both long and short) due to how well it flows with the factory lines and just looks like an extension of the valence. I would note that if your car has suffered any prior damage (or even "repair" to the lower valence flange) it may make a flange-mounted install difficult....but with the lower mounting, you can install anywhere below the "bump" bead detail in the valence. You'll still be able to get a good looking installation even if the flange is bent or rusty/missing, simply space in up from the flange. (the hardware will not be as accessible from the back, as it moves up behind the nose panel) You may have seen some modified cars out there with these air dams nearly scraping the ground, leading you to believe you need a high mounted short version just to make it in your driveway! this is NOT true. these cars are on air suspension or coilovers adjusted beyond functional ride height. there are a couple full blown SVRA race cars running Low/Long air dams on track with no ground clearance problems.

Please feel free it Email me at if your question has not been answered here!


Next, read up on new products, services and installation tips:

We have bolts!

All sheet metal parts now come with supplied stainless steel metric hardware (unless stated otherwise). I often prefer nutserts (riv-nuts) over conventional nuts, but not everyone has the tools to install them. I suggest purchasing a kit and practice installing them. They are a real time and knuckle saver.  M4, M5 & M6 are the most common size body & trim fasteners.

Getting started:

Proper alignment, adjustment & bolt spacing are critical to a clean and solid installation. I suggest starting any test fit or 'mock up' installation by protecting your paint. Masking tape is cheap, paint repair is not. Use a wide roll and cover every surface that might come in contact with your new part, until the final install. Here is my install tool list, you don't need all of these, but this is what I have found to work well for me:

Tools for mock-up and installation:

'Marson' nutsert tool with metric mandrels, 'Pony' spring clamps, 'Cleco' tool and 1/8" cleco fasteners, cleco longjaw side clamps, 'vice grip' 9SP (or even better 'grip-on' brand) locking pliers, 'Starret' dividers, USA made 1/8" pilot drill bit & other needed bit sizes (sometimes an 'irwin' step-bit), 90 degree countersink bit, 'Starret' carbide scribe, sprung centerpunch & machinist rule, small cordless drill and driver, flexible ruler & 320 grit sand paper on foam block and red scotchbrite pad.  (* not shown, #2 pencil & fine tip sharpie marker)


Installing aluminum sheet metal parts:

Now that you're all masked off and set up, hold the part up to the mounting surface, (sometimes having a helper to get the side-to-side adjustment dialed in is nice), get the center lined up and split the difference if there is any major variation side to side. You may want to measure a couple common points of reference and make some marks with a pencil to set adjustment parameters.

Now using the spring clamps, (or side cleco clamps, or vice grips with some padding, or a combo of all three), temp clamp the mounting flange in place. (Make sure not to damage/scratch the aluminum doing so). Stand back and check level visually. Re-check your reference marks and note any adjustments to mounting flange or vehicle sheet metal needed.

Make adjustments (see "flange adjustment" article) and re-fit. Now plan your hole layout, (some parts come with no holes) using the masking tape above the mounting flange, you can measure and divide (the compass tool) to evenly space the holes. I typically do eight fasteners for most front air dams. One on the end of the flange, about 1/2" in, and then six more spaced evenly (they end up about 7" apart) rarely do I use an uneven number of fasteners with one in the center....but for some applications this works.

Then with the divider again, using the edge of the flange, you can find center (where you want to drill) and mark that. center punch the marks and drill with the 1/8" bit, then install a cleco fastener (one at a time, making sure the hole alignment does not change as you drill and install the clecos). You can now remove the clamps. 

Again one at a time: remove a cleco, drill out to a larger size for the bolt, install bolt. (or remove and drill out larger for nutsert installation). De-burr edge of hole with countersink bit or step bit. install hardware and snug up progressively, then final tighten.



Paint prep and 'raw aluminum' care and repair:

Whether you are preparing your aluminum part for paint, or simply removing small scratches and giving it a cosmetic tune, here are a few products and procedures: 240 grit on foam pad (for sanding out scratches) 320 grit on foam pad (for removing the sanding marks) and 'fine' red scotchbrite pads, for graining and finishing.

If there are deeper scratches or even gouges, you can start with a coarse grit and topically blend out damage. Just remember to sand progressively. 80, 100, 150, 240, 320 (or some variation of these grits) if you still see sanding scratches, go back a couple grits rather than spend an hour with 320. The last step, is to "grain" the part as the photograph illustrates, with long linear strokes from one side all the way to the other.

Wipe clean with acetone or lacquer thinner & apply a light coat of self etch primer before a top coat. (or just wd40, paste wax, etc. if you are leaving the part Raw)



E30 rear spoiler installation tip:

Applying a small ring of butyl rubber 'strip caulk' to both sides of the washer will both keep the washer stuck to your socket while fishing it up under the trunk lid, as well as sealing water out of your trunk.

Prior to installation of your E30 rear spoiler, I recommend that you adjust the latch (underside of trunk lid) out, to lift the trunk lid a little higher when fully closed. even though I test install every part on a factory IS trunk here at Kooglewerks, there is a chance that the outer edge of the flange (that hangs over the end) can make contact with the top of your quarter panel if you are not careful.  I am now shipping these parts with a small piece of pre-cut closed cell foam, to be installed on the underside of the spoiler & insulate from paint damage. 

you may also experience fit issues with the flange-to-quarter panel resulting in a "pointed up" look of the leading edge. This can be rectified by simply opening the trunk & supporting it with one hand, while gently and carefully pushing down on the outside "high" point of the flange end. this will subtly adjust/bend the end down, resulting in a tighter fit to the body. I would rather make this adjustment on the car, than send them out with the ends bent down so much that they contact the quarter panel.

always close your trunk lid by pressing down on the mounting flange, NOT the trailing edge of the spoiler lip.

E30 cup holder install notes:

the current version of the e30 cup holders are being shipped out with only a standard 12v outlet/socket. after going through a few suppliers for the USB chargers outlets, I decided to no longer provide them as an option (they flat-out sucked.) you can find your own and replace the socket if you'd like.