This body modification doesn’t work for every car, it just takes away from the design flaw on some cars where the edges of the front wheels are open to the oncoming air. It also bolted right on to the stock bumper wheel well screws, so the only additional component required was the fin itself, which is just sheet aluminum. The corners are rounded off to reduce the wind’s leveraging ability to bend the excess material which is far from the mounting points.

I would highly recommend this modification if you can see tire tread to the side of the bumper when looking at your vehicle head-on.

As great as it is so far, however, I wouldn’t have bought it had I known the car had another problem. The intake manifold cracked on one of the passenger-side corner bolt holes. It looks like both the upper and lower parts (3100/3400 intake manifolds come in two parts) are affected.

For the time being, I have taped it up, since I got a OBD2 code (p0507) which basically said the engine was getting more air than expected, and it was likely from that crack.

Hopefully I can save up about $80 so I can get one from a you-pull-it place, which I could clean up, bore out, and polish, and then paint (things I’ve been wanting to do anyway, but weren’t coming up soon on the to-do list) without that crack causing any performance problems.

I wasn’t surprised there wasn’t any sort of huge horsepower increase, but I did notice a small increase. I would recommend this upgrade if your 3100 engine has already had other horsepower upgrades, since it would become a notable area of restriction at that point. I’d also recommend it as an upgrade if you’re looking for a discrete way to increase horsepower, since it appears stock. It’s a low difficulty replacement if you have the right tools. Just make sure you put the linkage back together right, since you depend on that to control the engine.