Here is my opinion on the matter.
0) Camera angle: This can make and break a car. Most cars can look pretty lame at poor angles. Those supras might be exactly the same, but a bad angle can throw the whole car off.
1) Lowering:
Celica's even the gt-s model look conciderably better when lowered. And the better look tends to come from being lowered slightly more than what is benificial. Find a celica that has been lowered ~3". When the top of the tire is level with the fender well or tucked in it, it gives a much better look. Look at the more agressive supra pic. His wheels are slightly tucket, and fall just above the fender line. This helps the look.
2) Rims:
There are various ways to make the wheels look right in a car.
Ona note of your wheels vs the supras wheels. Look at the face. The face on your wheels arches out wards. While the face on the front supra wheel is near flat and the rear is dipped. This adds to an agressive look. A car with dipped all around makes a car look very tough. Check out what it does to the 350z.
All these cars have 18" wheels but they look larger than others for various reasons.
This is a stock track model:
http://www.350zmotoring.com/gallery/dat ... line_1.jpg
This is a stock enthusiest model.
http://www.350zmotoring.com/gallery/dat ... 3_0322.JPG
This is a model that has been lowered and has 18x9.5 all around.
http://www.uploadfile.info/uploads/e8759063a5.jpg
here is the lesson:
Now, even though all the wheels are 18" they all look like they fit the car very differently. The enthusiest models wheels look larger than the track model's wheels and the nismo rims look larger than both.
a) Offset makes a wheel look larger. By being tucked further in, it makes the wheels appear smaller. Offset is very key to this. The width is also a larger part of this, but much of the time a wider wheel brings the lip or face of the wheel close to the edge of the fender. This is especialy noticable when you look at a car downward.
b) Lip. Notice the 18's of the enthusiest model look larger than the 18s of the track model. Notice the enthusiest model has no lip. The spokes continue to the tire, giving the effect that is is a larger wheel. Even though a lip looks good on a car, wheels with lips might look more fitting on a celica if they are 18s.
Here is my track model next to an enthusiest model to show you how they compare.
http://www.350zmotoring.com/gallery/dat ... cn2582.jpg
The fender wells on the celica have a much larger radius than a stock ratio tire can fill. You will have to go larger. A tire that fits the arch of the fender. Next you need a wheel that looks right in that tire size. 17 will be a minumum. I will show you some examples of wheels on alltracs that accomplish some of this effect.
Bob's alltrac. It is actually on 16" wheels. But the offset/width and being dished gives a nice aggressive appearance. Also note the tire size and how it relates to the arch of the fender. Wide wheels automaticly make the car look more aggresssive anyway.
This car does another method. The tires are not as wide, but the diameter fits the fender arch well and the lowered height makes it fit well against the tire. It also has a fairly aggresive offset.
Now this car only has it half right. Look how the rears look aggressive, while the fronts don't look right.
Having a larger wheel that fits the fender line well and is dished makes it look much more aggressive while the front looks like the offset is too low compared to the rear dwarfing its size.
While this car with the same kit semed to make it look better by make a better choice for the fonts to better match the rears.
Then look at this car. The offset and width really make it aggressive. Even though it only has 17" wheels the face having such close contact to the lip helps give it a larger impression.
Fenders:
Now look at the fenders of the alltrac and compare them to the fenders of the supra.
The celica has blister fenders flares which makes it look agressive but the top of the rear quarter panel of the supra makes it look more aggressive. its gives the whole car a nice width. The supra als has more hard lines than the celica which may aide this look.
One item to really concider is the roll of the fenders. This is something I notice on a lot of cars. The way the fender rolls under neath can make the wheels look diffrerent. Just slightly though. The rear celica fenders go straight back, and don't look right.
Body: The body is a huge key in the stance as well, and the celica has one major flaw that makes it 1) harder to look right with a lip, and 2) looked stupid in certain angles. The long front overhang.
This alone makes it very difficult for one to adjust the look of the celica.
If a lip kit could be designed to make the over hang not seem so extreme this could really help improve the look of the car.
Also note the side skirts. if the side skirts of a celica are too low they make the car almost seem too skinny. This is another issue to avoid. If something could be made to make the car seem slightly lower and help the lines blend better with the wheels it may help.
Lastly the rear bumper. The arch upward at the bottom of the bumper is a good line for the car, however the exposed gas tank takes away from this. Look at this rear skirt and see how covering up the gas tank makes the car look more aggressive.
My suggestion to maybe make your car look a little more agressive would be:
1) Rolling the fenders.
2) Lowering it slightly more.
3) Getting longer wheel studs on the front and add a spacer to bring the wheel out. And get a wider spacer on the rear to make it match.
This might help some towards what you seek.
.2psi