definitely JPJ will not allow. so be prepared to get summoned.

Putting cartoon pictures straight out of book comic/tv show doesn't seem to match real cars.

They just simply print out oversized stickers and stick on the car.

The FInal Fantasy R8 & Porsche seems decent but the rest just makes the cars look messy. Too much stickers can spoil the look if not done properly. Car stickers should be simple & specifically designed to suit the car's design & color, not just print & stick.

lololol!
just paint your bumper white,then looks nice already.
simple always looks cool 
pa kamek xpenah nangga rah kuching oh? 

Your's quite OK, Black outline vs red blood matches your body color & bumper, the character stands out since it's not messy with so many stickers.

But, may i suggest you don't put full body of the character, instead zoom it so it covers like his face or half the body and have him tilt abit, with the blood spill bigger so the character takes 1 door while the blood flow takes the other door. This way you can blend the sticker into car more naturally the sticker looks like part of the car instead of looking like a Car with Stickers.

The side of the front you can also put some smaller stickers, and you can put the big chainsaw at the front of the engine cover.

Still much better than the typical Japanese stick all sticker you can on the car types.

Or you can copy some Zero to Hundred Myvis, they put alot of black Zero to Hundred logo of different size across the white body so they look more like a patterned car instead of stickers. Something like camo just it stands out instead of blending in to environment.

Wao ! It look so interesting ! 

but just got 2 quest to ask...

1.) I look at the 4 door car.. the sticker stick at rear door window.. do they still can wind down their window...? 

2.) How much will it cost...? 

bosozoku is art. Please dont compare to these anime